Room list reappears when turning it off and changing to responsive mode

[telmich]

Referring to #12279 for base information

User list of room re-appearing

If in non-responsive mode you disable the list of users in a room, you shrink the window width to half, causing responsive mode to be activated. Then switch back to regular width and the user list will re-appear. Clicking on the icon top right to make it vanish does not have an effect on the first click. On second click it disappears.

This is strongly confusing, as a) something that is disabled re-appears and b) it needs 2 instead of one click after responsive mode was activated