Fix overlay headers being blocked by loading layer

osu.Game/Overlays/OnlineOverlay.cs

@@ -3,6 +3,7 @@
 
 #nullable disable
 
+using System;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
@@ -22,6 +23,7 @@ namespace osu.Game.Overlays
         protected readonly OverlayScrollContainer ScrollFlow;
 
         protected readonly LoadingLayer Loading;
+        private readonly Container loadingContainer;
         private readonly Container content;
 
         protected OnlineOverlay(OverlayColourScheme colourScheme, bool requiresSignIn = true)
@@ -65,10 +67,21 @@ namespace osu.Game.Overlays
                         },
                     }
                 },
-                Loading = new LoadingLayer(true)
+                loadingContainer = new Container
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Child = Loading = new LoadingLayer(true),
+                }
             });
 
             base.Content.Add(mainContent);
         }
+
+        protected override void UpdateAfterChildren()
+        {
+            base.UpdateAfterChildren();
+
+            loadingContainer.Padding = new MarginPadding { Top = Math.Max(0, Header.Height - ScrollFlow.Current) };
+        }
     }
 }