Read markers should be synchronised across clients

- move the check on read marker visibility in viewDidAppear method

vector-im/riot-meta#8

Riot/ViewController/RoomViewController.m

@@ -422,9 +422,6 @@
         [self.bubblesTableView setContentOffset:CGPointMake(-self.bubblesTableView.contentInset.left, -self.bubblesTableView.contentInset.top) animated:YES];
         
     }];
-    
-    isAppeared = YES;
-    [self checkReadMarkerVisibility];
 }
 
 - (void)viewWillDisappear:(BOOL)animated
@@ -471,6 +468,9 @@
 {
     [super viewDidAppear:animated];
     
+    isAppeared = YES;
+    [self checkReadMarkerVisibility];
+    
     if (self.roomDataSource)
     {
         // Set visible room id