Summary:
As reported in https://grist.slack.com/archives/C069RUP71/p1655316194602829, when a table is hidden by ACL, it was still showing as a blank 'ghost' option to select data when adding a widget:
{F55498}
The fix is simply to return `true` from `isHiddenTable` for empty table IDs, which indicate a table hidden by ACL. `TableRec.isHidden` is supposed to match this so I updated it too, and I cleaned up a tiny bit of other related code.
Test Plan: Extended `nbrowser/AccessRules1.ts` to test the data options when adding widgets.
Reviewers: jarek
Reviewed By: jarek
Differential Revision: https://phab.getgrist.com/D3530
460f22b701