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/PowerMonitoringConsoleBoundUserInterface.cs

@@ -1,4 +1,5 @@
 using Content.Shared.Power;
+using Robust.Client.UserInterface;
 
 namespace Content.Client.Power;
 
@@ -11,9 +12,9 @@ public sealed class PowerMonitoringConsoleBoundUserInterface : BoundUserInterfac
 
     protected override void Open()
     {
-        _menu = new PowerMonitoringWindow(this, Owner);
-        _menu.OpenCentered();
-        _menu.OnClose += Close;
+        _menu = this.CreateWindow<PowerMonitoringWindow>();
+        _menu.SetEntity(Owner);
+        _menu.SendPowerMonitoringConsoleMessageAction += SendPowerMonitoringConsoleMessage;
     }
 
     protected override void UpdateState(BoundUserInterfaceState state)
@@ -22,9 +23,6 @@ public sealed class PowerMonitoringConsoleBoundUserInterface : BoundUserInterfac
 
         var castState = (PowerMonitoringConsoleBoundInterfaceState) state;
 
-        if (castState == null)
-            return;
-
         EntMan.TryGetComponent<TransformComponent>(Owner, out var xform);
         _menu?.ShowEntites
             (castState.TotalSources,
@@ -40,13 +38,4 @@ public sealed class PowerMonitoringConsoleBoundUserInterface : BoundUserInterfac
     {
         SendMessage(new PowerMonitoringConsoleMessage(netEntity, group));
     }
-
-    protected override void Dispose(bool disposing)
-    {
-        base.Dispose(disposing);
-        if (!disposing)
-            return;
-
-        _menu?.Dispose();
-    }
 }