Tab Switcher: Preserve the selected position after a tab is closed

[aborg-dev]

Hello! First time contributor here :)

I have a suggestion about the behavior of tab_switcher, specifically, which tab is selected (highlighted) after the currently selected tab is closed with a keyboard shortcut <Ctrl-Backspace>.

Current behavior

At the moment, after closing a tab, the selection jumps to the first item in the list.

before.webm

Suggested behavior

I suggest to preserve the selected position in the list - this will make it easier to close multiple old tabs (as they are already sorted that way) with consecutive <Ctrl-Backspace>. I also think this behavior is more intuitive.

after.webm

Implementation

You can find the implementation of the suggested behavior in this PR: #22861. I would love to continue working on it if this change is welcome.