Start DM on first message (#6367)

Start DM on first message

Co-authored-by: Philippe Loriaux <philippel@element.io>

Riot/Modules/Room/RoomViewController.h

@@ -127,6 +127,19 @@ extern NSNotificationName const RoomGroupCallTileTappedNotification;
  */
 - (void)displayRoomPreview:(RoomPreviewData*)roomPreviewData;
 
+/**
+ Display a new discussion with a target user without associated room.
+ 
+ @param directChatTargetUser Direct chat target user.
+ @param session The Matrix session.
+ */
+- (void)displayNewDirectChatWithTargetUser:(nonnull MXUser*)directChatTargetUser session:(nonnull MXSession*)session;
+
+/**
+ Pop to home view controller
+ */
+- (void)popToHomeViewController;
+
 /**
  If `YES`, the room settings screen will be initially displayed. Default `NO`
  */