Summary:
Flaky Dates test failures related to the use of JQuery autocomplete for time
zones, which wasn't working well.
This diff replaces that autocomplete (as well as a similar select box in
DocumentSettings) with our newer autocomplete, adding some select-box like
behavior.
Most of the behavior is factored out into ACSelect, which could be more
generally useful.
Adds an option to autocomplete to keep options ordered according to their
initial order.
Unrelated: fix up usage of MultiHolder in Drafts to avoid 'already disposed'
warnings.
Test Plan: Fixed several affected tests.
Reviewers: jarek
Reviewed By: jarek
Differential Revision: https://phab.getgrist.com/D2919
Summary: Cells will remember their previous state when user pressed the escape key. Grist will offer a way to continue with the draft, by showing notification and a tooltip above the editor.
Test Plan: Browser tests were created
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2822
