Remove some BUI boilerplate (#28399)

* Remove some BUI boilerplate

- The disposals overrides got removed due to the helper method handling it.
- Replace window creation with CreateWindow helper.
- Fixed some stinky code which would cause exceptions.

* More

* moar

* weh

* done

* More BUIs

* More updates

* weh

* moar

* look who it is

* weh

* merge

* weh

* fixes

Content.Client/PDA/PdaBoundUserInterface.cs

@@ -24,14 +24,13 @@ namespace Content.Client.PDA
 
             if (_menu == null)
                 CreateMenu();
-
-            _menu?.OpenCenteredLeft();
         }
 
         private void CreateMenu()
         {
-            _menu = new PdaMenu();
-            _menu.OnClose += Close;
+            _menu = this.CreateWindow<PdaMenu>();
+            _menu.OpenCenteredLeft();
+
             _menu.FlashLightToggleButton.OnToggled += _ =>
             {
                 SendMessage(new PdaToggleFlashlightMessage());
@@ -96,7 +95,6 @@ namespace Content.Client.PDA
             _menu?.UpdateState(updateState);
         }
 
-
         protected override void AttachCartridgeUI(Control cartridgeUIFragment, string? title)
         {
             _menu?.ProgramView.AddChild(cartridgeUIFragment);
@@ -118,15 +116,6 @@ namespace Content.Client.PDA
             _menu?.UpdateAvailablePrograms(programs);
         }
 
-        protected override void Dispose(bool disposing)
-        {
-            base.Dispose(disposing);
-            if (!disposing)
-                return;
-
-            _menu?.Dispose();
-        }
-
         private PdaBorderColorComponent? GetBorderColorComponent()
         {
             return EntMan.GetComponentOrNull<PdaBorderColorComponent>(Owner);