UI: Fixed crash at startup when pressing some keys before the game se…

…lection screen is finished loading

UI/Controls/StateGrid.axaml.cs

@@ -247,7 +247,7 @@ private void InitGrid(bool forceUpdate = false)
 
 		private void timerInput_Tick(object? sender, EventArgs e)
 		{
-			if(!IsEffectivelyVisible || !IsKeyboardFocusWithin) {
+			if(!IsEffectivelyVisible || !IsKeyboardFocusWithin || Entries == null || Entries.Count == 0) {
 				_entryToLoad = null;
 				_waitForRelease = false;
 				return;