Tidy up various input handling anomalies

osu.Game/Graphics/UserInterfaceV2/OsuPopover.cs

@@ -14,7 +14,6 @@
 using osu.Game.Input.Bindings;
 using osu.Game.Overlays;
 using osuTK;
-using osuTK.Input;
 
 namespace osu.Game.Graphics.UserInterfaceV2
 {
@@ -75,14 +74,6 @@ protected override void PopOut()
                 samplePopOut?.Play();
         }
 
-        protected override bool OnKeyDown(KeyDownEvent e)
-        {
-            if (e.Key == Key.Escape)
-                return false; // disable the framework-level handling of escape key for conformity (we use GlobalAction.Back).
-
-            return base.OnKeyDown(e);
-        }
-
         public virtual bool OnPressed(KeyBindingPressEvent<GlobalAction> e)
         {
             if (e.Repeat)

osu.Game/Screens/Edit/Compose/Components/ComposeBlueprintContainer.cs

@@ -111,25 +111,26 @@ protected override void TransferBlueprintFor(HitObject hitObject, DrawableHitObj
 
         protected override bool OnKeyDown(KeyDownEvent e)
         {
+            // Until the keys below are global actions, this will prevent conflicts with "seek between sample points"
+            // which has a default of ctrl+shift+arrows.
+            if (e.ShiftPressed)
+                return false;
+
             if (e.ControlPressed)
             {
                 switch (e.Key)
                 {
                     case Key.Left:
-                        nudgeSelection(new Vector2(-1, 0));
-                        return true;
+                        return nudgeSelection(new Vector2(-1, 0));
 
                     case Key.Right:
-                        nudgeSelection(new Vector2(1, 0));
-                        return true;
+                        return nudgeSelection(new Vector2(1, 0));
 
                     case Key.Up:
-                        nudgeSelection(new Vector2(0, -1));
-                        return true;
+                        return nudgeSelection(new Vector2(0, -1));
 
                     case Key.Down:
-                        nudgeSelection(new Vector2(0, 1));
-                        return true;
+                        return nudgeSelection(new Vector2(0, 1));
                 }
             }
 
@@ -151,7 +152,7 @@ protected override void OnKeyUp(KeyUpEvent e)
         /// Move the current selection spatially by the specified delta, in gamefield coordinates (ie. the same coordinates as the blueprints).
         /// </summary>
         /// <param name="delta"></param>
-        private void nudgeSelection(Vector2 delta)
+        private bool nudgeSelection(Vector2 delta)
         {
             if (!nudgeMovementActive)
             {
@@ -162,12 +163,13 @@ private void nudgeSelection(Vector2 delta)
             var firstBlueprint = SelectionHandler.SelectedBlueprints.FirstOrDefault();
 
             if (firstBlueprint == null)
-                return;
+                return false;
 
             // convert to game space coordinates
             delta = firstBlueprint.ToScreenSpace(delta) - firstBlueprint.ToScreenSpace(Vector2.Zero);
 
             SelectionHandler.HandleMovement(new MoveSelectionEvent<HitObject>(firstBlueprint, delta));
+            return true;
         }
 
         private void updatePlacementNewCombo()

osu.Game/Screens/Menu/ButtonSystem.cs

@@ -245,6 +245,15 @@ protected override bool OnKeyDown(KeyDownEvent e)
             if (e.Repeat || e.ControlPressed || e.ShiftPressed || e.AltPressed || e.SuperPressed)
                 return false;
 
+            if (e.Key >= Key.F1 && e.Key <= Key.F35)
+                return false;
+
+            switch (e.Key)
+            {
+                case Key.Escape:
+                    return false;
+            }
+
             if (triggerInitialOsuLogo())
                 return true;
 

osu.Game/Screens/Play/GameplayMenuOverlay.cs

@@ -166,11 +166,6 @@ protected override void PopIn()
 
         protected override void PopOut() => this.FadeOut(TRANSITION_DURATION, Easing.In);
 
-        // Don't let mouse down events through the overlay or people can click circles while paused.
-        protected override bool OnMouseDown(MouseDownEvent e) => true;
-
-        protected override bool OnMouseMove(MouseMoveEvent e) => true;
-
         protected void AddButton(LocalisableString text, Color4 colour, Action? action)
         {
             var button = new Button