SP3.1: Update room settings for Spaces element-ios#5231

- Changed the Room Settings screen according to the new design
- Implemented the room access flow
- Added room upgrade support
- Implemented the room suggestion screen

Riot/Modules/Room/RoomViewController.h

@@ -92,6 +92,11 @@ extern NSNotificationName const RoomGroupCallTileTappedNotification;
  */
 - (void)displayRoomPreview:(RoomPreviewData*)roomPreviewData;
 
+/**
+ If `YES`, the room settings screen will be initially displayed. Default `NO`
+ */
+@property (nonatomic) BOOL showSettingsInitially;
+
 /**
  Action used to handle some buttons.
  */
@@ -138,6 +143,15 @@ extern NSNotificationName const RoomGroupCallTileTappedNotification;
 - (void)roomViewController:(RoomViewController *)roomViewController
             showRoomWithId:(NSString *)roomID;
 
+/**
+ Tells the delegate that the room has been moved to a new room.
+ 
+ @param roomViewController the `RoomViewController` instance.
+ @param roomID the replacement roomId
+ */
+- (void)roomViewController:(RoomViewController *)roomViewController
+          moveToRoomWithId:(NSString *)roomID;
+
 /**
  Tells the delegate that the user wants to start a direct chat with a user.