Room details: improve members count UX (#1050)

* Inject user id into room’s details

* Refactor member fetch logic in RoomDetailsScreenViewModel

* Refactor DI

* Fetch members in RoomMembersListScreenViewModel

* Fetch members in InviteUsersScreen

* Use joinedMembersCount in room members list

* Cleanup

* Limit members refresh

* Cleanup binding

* Fix UT build errors

* Fix RoomDetailsScreenViewModelTests

* Fix RoomMembersListScreenViewModelTests

* Fix UTs

* Fix RoomDetailsScreenUITests

* Refine RoomDetailsScreenViewModelTests

* Add roomProxy extension

* PR comments

* Refactor room’s counter to Int

* Improve updateMembers() performances

* Fix memory leaks

ElementX/Sources/Screens/RoomMemberListScreen/View/RoomMembersListScreenMemberCell.swift

@@ -53,8 +53,8 @@ struct RoomMembersListMemberCell_Previews: PreviewProvider {
             .mockBob,
             .mockCharlie
         ]
-        let viewModel = RoomMembersListScreenViewModel(mediaProvider: MockMediaProvider(),
-                                                       members: members)
+        let viewModel = RoomMembersListScreenViewModel(roomProxy: RoomProxyMock(with: .init(displayName: "Some room", members: members)),
+                                                       mediaProvider: MockMediaProvider())
         
         return VStack {
             ForEach(members, id: \.userID) { member in