Feature / bug fix: popup: open tab counters, lists, tab moving now work with tabs in non-current tabs

[FNCheng137]

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• I rebased my work on top of the main branch.
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Description

When using open tab counts and lists, the current behavior of this add-on is to count or list only relevant tabs in the focused window. For example, if a tab in a container is open in one window and when the popup menu is opened in another window, the open tab counter displays none and the list shows no tabs.

When a large number of tabs are opened in two or three windows, normally one would intuitively expect the counter and the list to count or list tabs in any window when finding open tabs. This behavior is counter-intuitive, misleading, and bad for usability.

Also this may harm privacy when the goal is to close all tabs before clearing site data.

Change

The counter now counts all tabs in all windows. The list now has a section for "Open Tabs in Other Windows". Now the move tabs to new window function can move tabs from all windows.

Breaking

L10n needs two new entries, namely Open Tabs in Other Windows and Move Tabs in All Windows to a Single Window. See PR in l10n repo mozilla-l10n/multi-account-containers-l10n#32.

Screenshot

Type of change

Select all that apply.

• Bug fix
• New feature
• Major change (fix or feature that would cause existing functionality to work differently than in the current version)

I personally consider the previous behavior a bug.

Tag issues related to this pull request:
Closing: #2159, #2878 (duplicate)