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/Power/Generator/PortableGeneratorBoundUserInterface.cs

@@ -1,6 +1,7 @@
 using Content.Shared.Power.Generator;
 using JetBrains.Annotations;
 using Robust.Client.GameObjects;
+using Robust.Client.UserInterface;
 
 namespace Content.Client.Power.Generator;
 
@@ -16,10 +17,25 @@ public sealed class PortableGeneratorBoundUserInterface : BoundUserInterface
     protected override void Open()
     {
         base.Open();
-        _window = new GeneratorWindow(this, Owner);
+        _window = this.CreateWindow<GeneratorWindow>();
+        _window.SetEntity(Owner);
+        _window.OnState += args =>
+        {
+            if (args)
+            {
+                Start();
+            }
+            else
+            {
+                Stop();
+            }
+        };
+
+        _window.OnPower += SetTargetPower;
+        _window.OnEjectFuel += EjectFuel;
+        _window.OnSwitchOutput += SwitchOutput;
 
         _window.OpenCenteredLeft();
-        _window.OnClose += Close;
     }
 
     protected override void UpdateState(BoundUserInterfaceState state)
@@ -30,11 +46,6 @@ public sealed class PortableGeneratorBoundUserInterface : BoundUserInterface
         _window?.Update(msg);
     }
 
-    protected override void Dispose(bool disposing)
-    {
-       _window?.Dispose();
-    }
-
     public void SetTargetPower(int target)
     {
         SendMessage(new PortableGeneratorSetTargetPowerMessage(target));