If you're on the first visible room and try to switch to the previous
one (or on the last visible room switching to the next one), the first
(or last) room in the list is incorrectly selected even if it's not
currently visible.
Fix this by not first entering each room and then checking whether it is
the one we really wanted, but iterating until we find a room that we
want and only entering it then.
- Fix the headers in icons only mode.
- Allow section collapsing
- Show scrollbar when needed
[2022-12-12_19-06-46.mkv](/uploads/e1633058b2b4a24ef7b6144bf5392b9c/2022-12-12_19-06-46.mkv)
BUG: 462576
This could be helpful for some working use-case: When user want to mute a channel temporary and want to un-mute it later, the icon could help user know the mute status at a glance so they won't forget to un-mute the channel.
This icon will only be shown if the channel is muted, and have no unread message and the item is not hovered, so it won't get in the way when user have unread messages.
