Scroll first room with unread mention to the middle.

Signed-off-by: Ivan Sein <ivan@nextcloud.com>

NextcloudTalk/RoomsTableViewController.m

@@ -618,7 +618,7 @@ typedef void (^FetchRoomsCompletionBlock)(BOOL success);
 - (void)unreadMentionsBottomButtonPressed:(id)sender
 {
     if (_nextRoomWithMentionIndexPath) {
-        [self.tableView scrollToRowAtIndexPath:_nextRoomWithMentionIndexPath atScrollPosition:UITableViewScrollPositionTop animated:YES];
+        [self.tableView scrollToRowAtIndexPath:_nextRoomWithMentionIndexPath atScrollPosition:UITableViewScrollPositionMiddle animated:YES];
     }
 }