Auto collapse unselected groups

[maverick74]

Is your feature request related to a problem? Please describe.
Some users never work in two groups at the same time. Either they're working on one group or they're working on the other.

As such...

Describe the solution you'd like
I would like to suggest a auto-collapse/auto-hide all other groups a user is currently not working on.

Describe alternatives you've considered
Chromium-Based browsers

Additional context
If the "Index Tab" feature works as the chromium-like tab groups do - #111 - , it would be of great help and solve the "quick switch between groups" problem ( naturally, without a quick switch there's no point in implementing this auto-collapse )

[metastable-void]

In #10, we have implemented quick show/hide containers via clicks on index tabs.

[maverick74]

In #10, we have implemented quick show/hide containers via clicks on index tabs.

I'm sorry! I didn't understand the feature correctly! I had to try it again... :)

But still, there's no auto-colapse of a group when we select a tab from another group.
And, also, i think it would make perfect sense to hide the "index tabs" of empty groups

[JohnLGalt]

If auto-collapse were to be implemented, I would like to have it as an option, versus just enabled. I usually prefer to collapse my containers manually.

[maverick74]

I would like to have it as an option, versus just enabled.

Naturally!!! It never crossed my mind to have it forced on everyone!!! :)
Options are good so that anyone can have it "their way"

[metastable-void]

Implemented in 4f57930.

[metastable-void]

Released as https://github.com/menhera-org/TabArray/releases/tag/v11.8.0.

[maverick74]

edit: i think my previous comment fits better at 196...