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/Anomaly/Ui/AnomalyGeneratorWindow.xaml.cs

@@ -18,17 +18,21 @@ public sealed partial class AnomalyGeneratorWindow : FancyWindow
 
     public Action? OnGenerateButtonPressed;
 
-    public AnomalyGeneratorWindow(EntityUid gen)
+    public AnomalyGeneratorWindow()
     {
         RobustXamlLoader.Load(this);
         IoCManager.InjectDependencies(this);
 
-        EntityView.SetEntity(gen);
         EntityView.SpriteOffset = false;
 
         GenerateButton.OnPressed += _ => OnGenerateButtonPressed?.Invoke();
     }
 
+    public void SetEntity(EntityUid uid)
+    {
+        EntityView.SetEntity(uid);
+    }
+
     public void UpdateState(AnomalyGeneratorUserInterfaceState state)
     {
         _cooldownEnd = state.CooldownEndTime;