fix: unsubscribe VisibilityChanged in _ExitTree, use IsActionReleased for ui_cancel, expose ApplyGamepadDeadzone public

scripts/UI/Marketplace.cs

@@ -57,7 +57,7 @@ public partial class Marketplace : Control
 
     public override void _Input(InputEvent @event)
     {
-        if (@event.IsActionPressed("ui_cancel") && IsVisible())
+        if (@event.IsActionReleased("ui_cancel") && IsVisible())
         {
             Hide();
             foreach (var c in ComponentsToDisable) c.ProcessMode = ProcessModeEnum.Inherit;