Add an autoremember timer

[cxw42]

Add a setting that, if a positive integer I, will cause all windows to be autoremembered every I minutes.

Fixes #316.

[andr222]

Good news.
Not yet
How do I try it ?

[cxw42]

@andr222 sorry for the delay in responding! CONTRIBUTING.md has instructions (tested on Ubuntu 20.04).

1. Do the "Getting started" section and step 1 of the "Developing" section.
2. Instead of "Developing" step 2, git switch issue316-autosave-timer
3. Do steps 3--5 of the "Developing" section

This will give you a separate TabFern installation in which you can test out the feature. It is totally separate from your Chrome Web Store TF installation, and will show up with an orange icon instead of a green icon.

[cxw42]

Force-push changes:

• Rebase on main
• Set change the default value of the autoremember timer from '' to 0.
• Add Jasmine tests of setting-definitions and setting-accessors
• Add setting-accessors:remove()

[cxw42]

Force-push changes: replace 😅 with \u{} (gitk can't display emojis, so don't put any in the source.)

[cxw42]

Rebased on latest main. Working in my local tests.

[andr222]

Hi, sorry for the delays on my side.
I started piling tabs, tried side horizontal tabs, and discovered that Vivaldi now allows anotation of tabs.
So it has become easier to manage tabs without a second application.
I will watch if it remains stable, but so far so good.
Thanks for tabfern while I really needed it.