Optimize leaving a room from home screen (#868)

* Use joinedMembersCount in HomeScreenViewModel

* Update matrix-rust-sdk to 1.0.62-alpha

ElementX/Sources/Services/Room/RoomProxy.swift

@@ -441,6 +441,18 @@ class RoomProxy: RoomProxyProtocol {
         }
     }
     
+    var invitedMembersCount: UInt64 {
+        room.invitedMembersCount()
+    }
+    
+    var joinedMembersCount: UInt64 {
+        room.joinedMembersCount()
+    }
+    
+    var activeMembersCount: UInt64 {
+        room.activeMembersCount()
+    }
+    
     // MARK: - Private
     
     /// Force the timeline to load member details so it can populate sender profiles whenever we add a timeline listener

ElementX/Sources/Services/Room/RoomProxyProtocol.swift

@@ -104,6 +104,12 @@ protocol RoomProxyProtocol {
     func acceptInvitation() async -> Result<Void, RoomProxyError>
     
     func fetchDetails(for eventID: String)
+    
+    var invitedMembersCount: UInt64 { get }
+    
+    var joinedMembersCount: UInt64 { get }
+    
+    var activeMembersCount: UInt64 { get }
 }
 
 extension RoomProxyProtocol {