Use member count instead of counting members
For the room details screen, use the member count as supplied by
matrix instead of waiting for the entire member list to be
retrieved and then manually adding up all the relevant users.
This removes the loading state of the member count, relying on
a spinner on the member list itself if the user actually wants
to see the members. (The performance of that will be improved
separately on the rust side in the future)
Closes#505
Most of the tests in `LeaveRoomPresenterImplTest.kt` where using `UnconfinedTestDispatcher` which was conflating some of the state returned by the presenter. This prevented to test one specific case which had been left with an `@Ignore` annotation.
This PR switches to `StandardTestDispatcher` so that the ignored test case can work and also fixes some other test cases whose behavior is now more correct under the `StandardTestDispatcher`.
Also updates our test factory method for `CoroutineDispatchers` to more easily obtain a `CoroutineDispatchers` which uses `StandardTestDispatcher`.
- Adds `ModalBottomSheet` to our design components (it wraps the homonimous Material3 one).
- Adds a bottom sheet to the Room list using the aforementioned design component.
- Adds navigation from the room list to a room detail (context menu "Settings" action).
- Consolidates the "leave room flow" into a new `leaveroom` module used by both the room list and the room details.
- Adds progress indicator to the leave room flow
- Uses new `leaveroom` module in `roomdetails` module too.
Parent issue:
- https://github.com/vector-im/element-x-android/issues/261
