Merge branch 'master' of https://github.com/ppy/osu into ingame_options

osu.Game/Screens/OsuScreen.cs

@@ -131,7 +131,15 @@ namespace osu.Game.Screens
                     Background.Exit();
             }
 
-            return base.OnExiting(next);
+            if (base.OnExiting(next))
+                return true;
+
+            // while this is not necessary as we are constructing our own bindable, there are cases where
+            // the GC doesn't run as fast as expected and this is triggered post-exit.
+            // added to resolve https://github.com/ppy/osu/issues/829
+            beatmap.ValueChanged -= OnBeatmapChanged;
+
+            return false;
         }
     }
 }

osu.Game/Screens/Select/Leaderboards/Leaderboard.cs

@@ -74,7 +74,7 @@ namespace osu.Game.Screens.Select.Leaderboards
                 scrollContainer = new ScrollContainer
                 {
                     RelativeSizeAxes = Axes.Both,
-                    ScrollDraggerVisible = false,
+                    ScrollbarVisible = false,
                     Children = new Drawable[]
                     {
                         scrollFlow = new FillFlowContainer<LeaderboardScore>