Move focus handling into PopIn

osu.Game/Overlays/Mods/ModSelectOverlay.cs

@@ -295,8 +295,6 @@ namespace osu.Game.Overlays.Mods
                     column.SearchTerm = query.NewValue;
             }, true);
 
-            SearchTextBox.TakeFocus();
-
             // Start scrolled slightly to the right to give the user a sense that
             // there is more horizontal content available.
             ScheduleAfterChildren(() =>
@@ -503,6 +501,8 @@ namespace osu.Game.Overlays.Mods
 
             base.PopIn();
 
+            SearchTextBox.TakeFocus();
+
             aboveColumnsContent
                 .FadeIn(fade_in_duration, Easing.OutQuint)
                 .MoveToY(0, fade_in_duration, Easing.OutQuint);