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/Cargo/BUI/CargoPalletConsoleBoundUserInterface.cs

@@ -2,6 +2,7 @@ using Content.Client.Cargo.UI;
 using Content.Shared.Cargo.BUI;
 using Content.Shared.Cargo.Events;
 using Robust.Client.GameObjects;
+using Robust.Client.UserInterface;
 
 namespace Content.Client.Cargo.BUI;
 
@@ -18,21 +19,9 @@ public sealed class CargoPalletConsoleBoundUserInterface : BoundUserInterface
     {
         base.Open();
 
-        _menu = new CargoPalletMenu();
+        _menu = this.CreateWindow<CargoPalletMenu>();
         _menu.AppraiseRequested += OnAppraisal;
         _menu.SellRequested += OnSell;
-        _menu.OnClose += Close;
-
-        _menu.OpenCentered();
-    }
-
-    protected override void Dispose(bool disposing)
-    {
-        base.Dispose(disposing);
-        if (disposing)
-        {
-            _menu?.Dispose();
-        }
     }
 
     private void OnAppraisal()