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/RoomMembersListScreenModels.swift

@@ -24,10 +24,16 @@ enum RoomMembersListScreenViewModelAction {
 struct RoomMembersListScreenViewState: BindableState {
     private var joinedMembers: [RoomMemberDetails]
     private var invitedMembers: [RoomMemberDetails]
+    
+    let joinedMembersCount: Int
     var canInviteUsers = false
     var bindings: RoomMembersListScreenViewStateBindings
     
-    init(joinedMembers: [RoomMemberDetails] = [], invitedMembers: [RoomMemberDetails] = [], bindings: RoomMembersListScreenViewStateBindings = .init()) {
+    init(joinedMembersCount: Int,
+         joinedMembers: [RoomMemberDetails] = [],
+         invitedMembers: [RoomMemberDetails] = [],
+         bindings: RoomMembersListScreenViewStateBindings = .init()) {
+        self.joinedMembersCount = joinedMembersCount
         self.joinedMembers = joinedMembers
         self.invitedMembers = invitedMembers
         self.bindings = bindings
@@ -46,10 +52,6 @@ struct RoomMembersListScreenViewState: BindableState {
                 member.matches(searchQuery: bindings.searchQuery)
             }
     }
-    
-    var joinedMembersCount: Int {
-        joinedMembers.count
-    }
 }
 
 struct RoomMembersListScreenViewStateBindings {