Fix separated game screen bumping (#33046)

I don't really understand why RecordedSplitContainer exists but removing it looks identical and fixes the panel bumping occasionally.

Content.Client/UserInterface/Controls/RecordedSplitContainer.cs

@@ -1,29 +0,0 @@
-using System.Numerics;
-using Robust.Client.UserInterface.Controls;
-
-namespace Content.Client.UserInterface.Controls;
-
-/// <summary>
-///     A split container that performs an action when the split resizing is finished.
-/// </summary>
-public sealed class RecordedSplitContainer : SplitContainer
-{
-    public double? DesiredSplitCenter;
-
-    protected override Vector2 ArrangeOverride(Vector2 finalSize)
-    {
-        if (ResizeMode == SplitResizeMode.RespectChildrenMinSize
-            && DesiredSplitCenter != null
-            && !finalSize.Equals(Vector2.Zero))
-        {
-            SplitFraction = (float) DesiredSplitCenter.Value;
-
-            if (!Size.Equals(Vector2.Zero))
-            {
-                DesiredSplitCenter = null;
-            }
-        }
-
-        return base.ArrangeOverride(finalSize);
-    }
-}