Unified room context menus

[t3chguy]

Fixes element-hq/element-web#19527

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Here's what your changelog entry will look like:

✨ Features

• Unified room context menus (#7072). Fixes IA1.2: Discovery: Room header menus element-hq/element-web#19527.

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[DoM1niC]

Wow this works fine and the events if I set a room to favourite seems fixed for me... but the low priority / favourit Chats could get divider from the rest... But this is in the end your choice

[niquewoodhouse]

I think these are mostly small changes but some might not be.

• mx_RoomHeader_name to be same colour and size as mx_RoomListHeader

• Room header name and avatar to align with your avatar from milestone 1.1

• Notifications icon to update based on selection (eg if room is muted, show muted icon)

• I think the room name could do with a hover state to give more feedback.
  eg

I wasn't aware this would change the room list options too. I knew we'd have to do this eventually if this worked out, just not maybe now. We might need to move the options around, tweak the styling a bit more, as this becomes a bit of a bigger change. E.g., inset borders between some options, and maybe consider if there's a need for each item in both DMs and Rooms (eg People in DM is potentially not so helpful) so we might to spend more time considering these details :(

[t3chguy]

I wasn't aware this would change the room list options too. I knew we'd have to do this eventually if this worked out, just not maybe now. We might need to move the options around, tweak the styling a bit more, as this becomes a bit of a bigger change. E.g., inset borders between some options, and maybe consider if there's a need for each item in both DMs and Rooms (eg People in DM is potentially not so helpful) so we might to spend more time considering these details :(

Can revert them if needed

[t3chguy]

• I've noticed in the threads lab the dropdown has a rotating arrow. Would be nice to be consistent and use that here too, but open to not doing for now as we've not tested this yet