Fix editor menus overflowing off screen

Closes https://github.com/ppy/osu/issues/28750.

Yes this is not the perfect change to fix this (which would probably be
some framework change to take bounds of the parenting input manager into
account). I really do not want to go there and would like to just fix
this locally and move on. Due to the game-wide scaling container this
sorta works for any resolution anyhow.

osu.Game/Screens/Edit/Components/Menus/EditorMenuBar.cs

@@ -71,7 +71,10 @@ namespace osu.Game.Screens.Edit.Components.Menus
             });
         }
 
-        protected override Framework.Graphics.UserInterface.Menu CreateSubMenu() => new SubMenu();
+        protected override Framework.Graphics.UserInterface.Menu CreateSubMenu() => new SubMenu
+        {
+            MaxHeight = MaxHeight,
+        };
 
         protected override DrawableMenuItem CreateDrawableMenuItem(MenuItem item) => new DrawableEditorBarMenuItem(item);
 
@@ -143,7 +146,10 @@ namespace osu.Game.Screens.Edit.Components.Menus
                 BackgroundColour = colourProvider.Background2;
             }
 
-            protected override Framework.Graphics.UserInterface.Menu CreateSubMenu() => new SubMenu();
+            protected override Framework.Graphics.UserInterface.Menu CreateSubMenu() => new SubMenu
+            {
+                MaxHeight = MaxHeight,
+            };
 
             protected override DrawableMenuItem CreateDrawableMenuItem(MenuItem item)
             {

osu.Game/Screens/Edit/Editor.cs

@@ -343,6 +343,7 @@ namespace osu.Game.Screens.Edit
                                 Anchor = Anchor.CentreLeft,
                                 Origin = Anchor.CentreLeft,
                                 RelativeSizeAxes = Axes.Both,
+                                MaxHeight = 600,
                                 Items = new[]
                                 {
                                     new MenuItem(CommonStrings.MenuBarFile)