Option to mark room as Low Priority?

[rwjack]

Describe the problem

Couldn't find the official docs for this feature on Element, but I think it's used to throttle traffic for big federated rooms, so my homeserver doesn't blow up.

Describe the solution you'd like

Alternatives considered

No response

Additional context

No response

[kfiven]

I think #44 and #740 are the best solution if we want to mark bunch of rooms as favorite and rest of the room eventually be low priority.

I don't think this feature has any relation to throttling of rooms.

[greentore]

I think both should be implemented. In Element unread low priority rooms don't bubble up to the containing spaces, which I find pretty useful.