Summary: The list of users allows copying users' emails to clipboard, and viewing the doc as that user.
Test Plan: Added a basic test case
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2711
Summary:
- Enable narrow-screen layout for home page
- Clean up margins/spacing on small-screen home page
- Use "<768" as small-screen condition rather than "<=768".
- Include meta-viewport tag conditionally, off by default.
- Include "Toggle Mobile Mode" option in AccountMenu to toggle it on.
- In a test, add an after() clause to restore window size even when test fails
Test Plan: Only tested manually on iPhone (Safari & FF).
Reviewers: paulfitz
Reviewed By: paulfitz
Subscribers: cyprien
Differential Revision: https://phab.getgrist.com/D2708
Summary:
- closes side bars when tapping content area
- opens left panel when tapping the page name
Test Plan: Includes browser tests.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2705
Summary:
This adds back-end support for query parameters `aclAsUser_` and
`aclAsUserId_` which, when either is present, direct Grist to
process granular access control rules from the point of view
of that user (specified by email or id respectively).
Some front end support is added, in the form of a tag that
shows up when in this mode, and a way to cancel the mode.
No friendly way to initiate the mode is offered yet.
Test Plan: added test
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2704
Summary:
The goal is that those who can edit ACL rules can create or change rules for
any resource, even if the rules block their own ability to see the resource.
Test Plan: Added a browser test, and a server test for who can call the new method.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2703
Test Plan: Tested Manually, behave well also for long page name.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2702
Summary:
This commit adds a bottom bar with 2 openers button for each side panels.
It takes care of showing/hiding other openers when appropriate.
It also implements the new style for narrow screen with the side panels overlapping the main pane.
Remaining tasks:
- adjust content of the breadcrumbs for narrow screen.
- content of the bottom bar
Test Plan: Adds test to projects/PagePanels
Reviewers: paulfitz
Reviewed By: paulfitz
Subscribers: dsagal
Differential Revision: https://phab.getgrist.com/D2701
Summary:
- Placed rule-updating functions in acl.py.
- Reset UI when rules update externally, or alert the user to reset if there
are pending local changes.
- Removed some unused and distracting bits from client-side DocModel.
A few improvements related to poor error handling:
- In case of missing DocActions (tickled by broken ACL rule handling), don't
add to confusion by attempting to process bad actions
- In case of missing attributes in ACL formulas, return undefined rather than
fail; the latter creates more problems.
- In case in invalid rules, fail rather than skip; this feels more correct now
that we have error checking and recovery option, and helps avoid invalid rules.
- Prevent saving invalid rules with an empty ACL formula.
- Fix bug with rule positions.
Test Plan: Added a python and browser test for table/column renames.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2698
Summary:
- Add ACLColumnList widget for a list of column IDs.
- Replace autocomplete widgets with simpler dropdowns.
- Add select dropdown for the Attribute of UserAttribute rules.
- Switch formula to use ACE editor.
- Factor out customized completion logic from AceEditor.js into a separate file.
- Implement completions for ACL formulas.
- Collect ACL UI files in app/client/aclui
Test Plan: Updated test case, some behavior (like formula autocomplete) only tested manually.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2697
Summary:
- Add headers to tables.
- Change styles to reduce boxes-within-boxes.
- Add validation of table and column IDs, both in UI and on server when saving rules.
- Add autocomplete for tables/columns used for UserAttribute rules.
- Add a fancy widget to set permission bits.
Test Plan: Updated browser test for new UI, added a test case for user attributes.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2695
Summary:
The bug manifested when multiple grid cells were selected, and then user
selected a record in another section that caused the grid to show a different
set of rows. Paste would then go into multiple rows even when they are not
visibly selected.
The test includes some porting of hacks from old browser tests to support
copy-pasting. In particular gu.sendKeys() is a useful alternative to
driver.find('body').sendKeys() which we've been using to work around
driver.sendKeys() limitations, but which apparently causes flakiness with
focus.
Test Plan: Browser test reproduces the bug before the fix.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2692
Summary:
- When adding records, negative rowIds may now be specified. They'll be replaced by proper IDs.
- If these negative IDs are used in Reference columns in subsequent actions in
the same bundle of UserActions, they get replaced with the proper rowIds.
- Use this to sync ACLResources and ACLRules from UI in a single batch of UserActions.
- Resolve the TODOs in GranularAccess test, to no longer need to guess resource rowIds.
Test Plan: Added a python unittest for mapping IDs; updated browser tests.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2691
Summary:
- Fix error-handling in bundleActions(), and wait for the full bundle to complete.
(The omissions here were making it impossibly to react to errors from inside bundleActions())
- Catch problematic rules early enough to undo them, by trying out ruleCollection.update()
on updated rules before the updates are applied.
- Added checkAclFormula() call to DocComm that checks parsing and compiling
formula, and reports errors.
- In UI, prevent saving if any aclFormulas are invalid, or while waiting for the to get checked.
- Also fixed some lint errors
Test Plan: Added a test case of error reporting in ACL formulas.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2689
Summary:
Adds an "enter safe mode" option and explanation in modal that appears when a document fails to load, if user is owner. If "enter safe mode" is selected, document is reloaded on server in a special mode. Currently, the only difference is that if the acl rules fail to load, they are replaced with a fallback that grants full access to owners and no access to anyone else. An extra tag is shown to mark the document as safe mode, with an "x" for cancelling safe mode.
There are other ways a document could fail to load than just acl rules, so this is just a start.
Test Plan: added test
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2686
Summary:
Disable the submit button while a form submission is pending.
(We don't move to the next page without waiting since we get the page to
redirect to from the server.)
Test Plan: Tested manually by pausing the server and trying to submit multiple times.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2688
Summary:
This changes how user attributes are loaded. They are now loaded
directly from sqlite, with per-session caching. Optimizations
considered but not addressed yet are (1) adding indexes to user attribute
tables and (2) swapping in a thinner sqlite wrapper.
The main benefit of this diff is that changes to user attribute
tables now work. Clients whose user attributes are not changed
see no effect; clients whose user attributes have changed have
their document reloaded.
For the purposes of testing, the diff includes a tweak to
GristWSConnection to be "sticky" to a specific user when reloading
(and support machinery on the server side to honor that). Until
now, if a GristWSConnection reloads, it uses whatever the current
default user is in the cookie-based session, which can change.
This was complicating a test where multiple users were accessing
the same document via different clients with occasional document
reloads.
Code for updating when schema or rule changes happen is moved
around but not improved in any meaningful way in this diff.
Test Plan: existing tests pass; extended test
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2685
Summary:
Also added a Chrome option to tests to suppress popup to save passwords,
and unified setting of Chrome options in one shared file.
Test Plan: Tested locally, reproduced the problem by adding a delay in BaseAPI.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2687
Summary:
Some slight difference appeared, possibly during rebase, about including
compare parameters in URLs.
Test Plan: Browser test was failing, now passes
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2683
Summary:
- When viewing a snapshot, list all snapshots for a doc, highlighting the current one.
- Include links in per-snapshot menu to compare-to-current and compare-to-previous.
- Compare links include "beta" tags.
- Set order of comparison to have older on the left, and newer on the right.
Test Plan: Moved out DocHistory test from Snapshots, and added some test cases.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2681
Summary:
This adds any parameters in a document url whose key ends in '_'
into a `user.Link` object available in access control formulas
and in setting up characteristic tables.
This allows, for example, sending links to a document that contain
a hard-to-guess token, and having that link grant access to a
controlled part of the document (invoices for a specific customer
for example).
A `user.Origin` field is also added, set during rest api calls,
but is only tested manually at this point. It could be elaborated
for embedding use-cases.
Test Plan: added test
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2680
Summary:
- Factored out ACLRuleCollection into its own file, and use for building UI.
- Moved AccessRules out of UserManager to a page linked from left panel.
- Changed default RulePart to be the last part of a rule for simpler code.
- Implemented much of the UI for adding/deleting rules.
- For now, editing the ACLFormula and Permissions is done using text inputs.
- Implemented saving rules by syncing a bundle of them.
- Fixed DocData to clean up action bundle in case of an early error.
Test Plan: WIP planning to add some new browser tests for the UI
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2678
Test Plan: Added a check to the test case verifying the copied link.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2673
Summary:
No behavior changes.
Diff includes an intermediate commit with only renames, for easier review.
Test Plan: Existing tests should pass.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2669
Summary:
- Remove modules related to old login / profile that we don't plan to bring back.
- Remove old unused DocListModel.
- Remove ext* tests that have been skipped and don't work.
- Remove old ModalDialog, and switch its one remaining usage to the newer way.
Test Plan: All tests should pass, and as many as before.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2668
Summary:
- New UI for the modal look mostly following the design prepared previously.
- Use <object> for rendering PDFs (on a Mac works on Firefox, Chrome, Safari; needs checking on Windows)
- While we are at it, use <video> and <audio> for relevant files (object would
render them too, but without the option to disable autoplay).
- Use <object> for unknown types, except for text/html (unsafe) and other text
types (need more work to render well).
- Fix skipping save on Escape or when attachments are unsaved (previously a
noop action was emitted, creating surprises with undo).
- Display extension for files without preview, both in-cell and in the modal.
- Replace tiny "eye" icon to preview particular attachment with double-clicking.
- As an accidental feature, a particular attachment can be previewed by typing 1, 2, 3, etc into cell.
- Renamed PreviewsWidget/PreviewModel to AttachmentsWidget/AttachmentsEditor.
Test Plan: Unified old and new tests for attachments, added new test cases.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2667
Summary:
It can be hard to find changes, even when highlighted, in a table with many rows. This diff replaces long sequences of unchanged rows with a row containing "..."s.
With daff, I found that it is important to do this for sequences of unchanged columns also, but not tackling that yet.
Test Plan: added test
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2666
Summary:
- Added fields to _grist_ACLRules for the new Granular ACL representation
- Include a corresponding migration.
- Added ACLPermissions module with merging PermissionSets and converting to/from string.
- Implemented parsing of ACL formulas and compiling them into JS functions.
- Add automatic parsing of ACL formulas when ACLRules are added or updated.
- Convert GranularAccess to load and interpret new-style rules.
- Convert ACL UI to load and save new-style rules.
For now, no attempt to do anything better on the server or UI side, only to
reproduce previous behavior.
Test Plan: Added unittests for new files; fixed those for existing files.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2664
Summary:
This makes data diff rendering robust to changes in the names of tables.
It does not yet show information about those changes, but at least it
won't fail to show table content changes.
Added a missing case to ActionSummary concatenation that came up in
testing.
Test Plan: added test, updated test
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2661
Summary:
This makes a small tweak to show cell and row changes in card views
and card list views, and adds a test for it.
Test Plan: added tests
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2660
Summary:
With recent changes to action history, we can now remove the temporary
`finalRowContent` field from change details, since all the information
we need is now in the ActionSummary.
We also now have more information about the state of the common ancestor,
which previously we could not get either from ActionSummary or from
`finalRowContent`. We take advantage of that to flesh out rendering
differences where there are some changes locally and some changes
remotely.
There's still a lot more to do, this is just one step.
I have added a link to the UI for viewing the comparison. I wouldn't
want to advertise that link until diffs are robust to name changes.
Test Plan: added test, updated tests
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2658
Summary:
Type conversions and formula tranforms wait for the user and bundle multiple
actions. When an unrelated action is done (e.g. adding a page widget or a
column), we want to finalize the transform before applying it.
The approach turns out fairly complicated. There is an implicit queue of
bundles (which we don't let grow beyond 2, as that's too abnormal). Bundles may
be finalized by a user clicking something, or by an unrelated action/bundle, or
(as before) by transform DOM getting disposed.
- Updated RecordLayout to use bundleActions() helper
- Added support for nesting bundleActions inside another bundle (needed for
setting visibleCol during type change)
- In an unrelated tweak, when in debug-log in ActiveDoc, use a short representation of result.
Test Plan: Added a unittest for action bundling during type transform
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2655
Summary:
After an import from inside a document, one minute later, an important
QuerySet would get disposed, leaving the view section in a bad state,
and manifesting as JS errors on subsequent operations. (Might not
*always* happen because switching pages would prevent it from
manifesting, I think.)
Bad state that I've seen after transforms is probably explainable as
this bug, which is unrelated. Reproduction was hard because who knew one
had to wait a minute?!
Test Plan:
Added a unittest for the fix in QuerySet, and a browser test that
fails without the fix (JS errors, bad state), and passes with.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2653
Summary:
- Introduce a new SQLiteDB migration, which adds DB columns for formula columns
- Newly added columns have the special ['P'] (pending) value in them
(in order to show the usual "Loading..." on the first load that triggers the migration)
- Calculated values are added to .stored/.undo fields of user actions.
- Various changes made in the sandbox to include .stored/.undo in the right order.
- OnDemand tables ignore stored formula columns, replacing them with special SQL as before
- In particular, converting to OnDemand table leaves stale values in those
columns, we should maybe clean those out.
Some tweaks on the side:
- Allow overriding chai assertion truncateThreshold with CHAI_TRUNCATE_THRESHOLD
- Rebuild python automatically in watch mode
Test Plan: Fixed various tests, updated some fixtures. Many python tests that check actions needed adjustments because actions moved from .stored to .undo. Some checks added to catch situations previously only caught in browser tests.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2645
Test Plan: Added some checks that company and use_school get recorded. (Live doc will need to be updated before release.)
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2650
Summary:
- When displaying, include the country code, and don't assume state is always present.
- When entering, include a country selector (defaulting to US), and
make state/zip optional when non-US.
- Bring in an npm module with country codes.
Test Plan: Added a browser test case.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2647
Summary:
This is a prototype for expanding the conditions that can be used in granular ACLs.
When processing ACLs, the following variables (called "characteristics") are now available in conditions:
* UserID
* Email
* Name
* Access (owners, editors, viewers)
The set of variables can be expanded by adding a "characteristic" clause. This is a clause which specifies:
* A tableId
* The name of an existing characteristic
* A colId
The effect of the clause is to expand the available characteristics with all the columns in the table, with values taken from the record where there is a match between the specified characteristic and the specified column.
Existing clauses are generalized somewhat to demonstrate and test the use these variables. That isn't the main point of this diff though, and I propose to leave generalizing+systematizing those clauses for a future diff.
Issues I'm not dealing with here:
* How clauses combine. (The scope on GranularAccessRowClause is a hack to save me worrying about that yet).
* The full set of matching methods we'll allow.
* Refreshing row access in clients when the tables mentioned in characteristic tables change.
* Full CRUD permission control.
* Default rules (part of combination).
* Reporting errors in access rules.
That said, with this diff it is possible to e.g. assign a City to editors by their email address or name, and have only rows for those Cities be visible in their client. Ability to modify those rows, and remain updates about them, remains under incomplete control.
Test Plan: added tests
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2642
Summary:
* Fix old download endpoint to correctly pass org info in redirect.
* Switch to use newer download endpoint in client.
Old endpoint not removed. I started doing that, but it is used in copying, and it struck me that I'm not sure what should happen when copying from a site document to "Personal" - should it be the Personal that is associated with docs.getgrist.com currently, of should it be the Personal that is associated with the email of the user on whatever-site-we-are-on.getgrist.com. So leaving that as separate work.
Test Plan: updated tests
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2639
Summary:
- Add a /welcome/info endpoint, to serve a page after /welcome/user
- Add a new forms module to factor out the styles that feel more natural for a web form.
- Simplify form submission using JSON with a BaseAPI helper.
- The POST submission to /welcome/info gets added to a Grist doc, using a
specialPermit grant to gain access. A failure (e.g. missing doc) is logged
but does not affect the user.
Test Plan: Added a test case.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2640
Summary:
- Include column headers on each page for printing tables.
- Avoid page-breaks inside rows or cards of a card-list.
- Fix printing of charts that did not show up at all before.
- Add a browser test, not great, but somewhat functional.
Test Plan: New test, plus tested manually. Column headers work on Chrome and Firefox (not Safari).
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2636
Summary:
- Supports multi-page printing with some aggressive css overrides.
- Relies on a new function implemented by grist-plugin-api to print a
multi-page CustomView.
- Renders all rows for printing for scrolly-based views.
Test Plan:
Doesn't seem possible to do a selenium test for printing. Tested
manually on Chrome, Firefox, and Safari.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2635
Summary:
- Move logo.css to core, since it's not included otherwise
- Remove unused old DocList and ViewLinker files.
- Remove #grist-app div that was only serving to supply a background
Test Plan: No changes of behavior, existing tests should pass.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2634
Summary:
For methods other than `GET`, `HEAD`, and `OPTIONS`, allow cookie-based authentication only if a certain custom header is present.
Specifically, we check that `X-Requested-With` is set to `XMLHttpRequest`. This is somewhat arbitrary, but allows us to use https://expressjs.com/en/api.html#req.xhr.
A request send from a browser that sets a custom header will prompt a preflight check, giving us a chance to check if the origin is trusted.
This diff deals with getting the header in place. There will be more work to do after this:
* Make sure that all important endpoints are checking origin. Skimming code, /api endpoint check origin, and some but not all others.
* Add tests spot-testing origin checks.
* Check on cases that authenticate differently.
- Check the websocket endpoint - it can be connected to from an arbitrary site; there is per-doc access control but probably better to lock it down more.
- There may be old endpoints that authenticate based on knowledge of a client id rather than cookies.
Test Plan: added a test
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2631
Summary: On Safari, in particular on mobile, the custom widget was truncated in height.
Test Plan: Tested manually on FF, Chrome, Safari (desktop) and Safari, Firefox (mobile)
Reviewers: paulfitz
Reviewed By: paulfitz
Subscribers: paulfitz
Differential Revision: https://phab.getgrist.com/D2629
Summary:
- Factor out focusing logic from Clipboard to FocusLayer.
- Generalize FocusLayer to support adding a temporary layer while a modal is open.
- Stop Mousetrap shortcuts while a modal is open.
- Refactor how Mousetrap's custom stopCallback is implemented to avoid
needing to bundle knockout for mousetrap.
Test Plan: Added a test that Enter in a UserManager doesn't open a cell editor from underneath the modal.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2626
Summary:
This moves all client code to core, and makes minimal fix-ups to
get grist and grist-core to compile correctly. The client works
in core, but I'm leaving clean-up around the build and bundles to
follow-up.
Test Plan: existing tests pass; server-dev bundle looks sane
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2627
Summary:
- Show a 'Copy Link' button in UserManager.
- Add icons for Copy (to copy link), and also for Video (to open video
tutorials in later onboarding changes)
- Add to UserManager a 'Public Access' member-like line for greater visibility
and to allow changing role.
- In main document page, add a "public access" icon.
- On saving UserManager, re-fetch DocInfo to update "public access" icon.
Test Plan: TBD
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2617
Summary:
- The card includes an image, a brief description, and a link to the tutorial.
- The left panel includes a link to the tutorial, and a button to reopen card.
- Card is collapsed and expanded with a little animation.
- Add a seenExamples pref for whether an example has been seen.
- Store the pref in localStorage for anon user.
Separately, added clearing of prefs of test users between tests, to avoid tests
affecting unrelated tests.
Test Plan: Added a browser test.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2602
Summary:
- Add icons to indicate a publicly-accessible document
- Dim inaccessible DocMenu items
Test Plan: Added a browser test for rendering inaccessible and public docs
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2594
Summary:
This adds query parameters useful for tailoring the Grist experience, with an eye to embedding.
Setting `style=light` removes side and top bars, as a first pass at a focused view of a single document page (this would benefit from refining).
Setting `embed=true` has no significant effect just yet other than it restricts document access to viewer at most (this can be overridden by specifying `/m/default`).
Test Plan: added tests
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2585
Summary:
- Hides left and right panels and the top bar
- Hides cursor and active-section highlight
- Hides "=" icon on formulas
- Nudges browser to include background for row/column headers, which is not
otherwise included.
Still only what's visible is printed (e.g. large tables not paginated).
Test Plan: Tried a few pages manually on Firefox and Chrome.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D2579
The cssVars.ts file has changed to include some more knobs
for custom theming. This commit updates the file, and
introduces a `stubs` directory for stubbing code that is
specific to our deployments of Grist and not of general interest.
