Add ability to show/hide community filter panel from the main UI

[dannycolin]

Is your suggestion related to a problem? Please describe.

I'm on a laptop and I often have two browser windows side-by-side. In order to maximize the screen space, I hide the userlist but I can't do the same with the community filter panel. Currently, the only way to show/hide it is via the settings but it's a bit cumbersome when you have to do it frequently.

Describe the solution you'd like

I'd like to have a button like the one for the user list that let me toggle on/off the community filter panel

Describe alternatives you've considered

Having a custom JS script injected with violentmonkey addon but It doesn't work on Firefox due to CORS blocking it

Additional context

none

[t3chguy]

Closing in favour of #18898