Limit typing notifications timeline jumps

Riot/Modules/Room/DataSources/RoomDataSource.h

@@ -98,6 +98,8 @@
                                      success:(void(^)(void))success
                                      failure:(void(^)(NSError*))failure;
 
+- (void)resetTypingNotification;
+
 @end
 
 @protocol RoomDataSourceDelegate <MXKDataSourceDelegate>

Riot/Modules/Room/DataSources/RoomDataSource.m

@@ -950,6 +950,10 @@
     }];
 }
 
+- (void)resetTypingNotification {
+    self.currentTypingUsers = nil;
+}
+
 #pragma - Accessibility
 
 - (void)setupAccessibilityForCell:(MXKRoomBubbleTableViewCell *)cell withCellData:(RoomBubbleCellData*)cellData