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/Lathe/UI/LatheBoundUserInterface.cs

@@ -1,6 +1,7 @@
 using Content.Shared.Lathe;
 using Content.Shared.Research.Components;
 using JetBrains.Annotations;
+using Robust.Client.UserInterface;
 
 namespace Content.Client.Lathe.UI
 {
@@ -17,9 +18,9 @@ namespace Content.Client.Lathe.UI
         {
             base.Open();
 
-            _menu = new LatheMenu(this);
-            _menu.OnClose += Close;
-
+            _menu = this.CreateWindow<LatheMenu>();
+            _menu.SetEntity(Owner);
+            _menu.OpenCenteredRight();
 
             _menu.OnServerListButtonPressed += _ =>
             {
@@ -30,8 +31,6 @@ namespace Content.Client.Lathe.UI
             {
                 SendMessage(new LatheQueueRecipeMessage(recipe, amount));
             };
-
-            _menu.OpenCenteredRight();
         }
 
         protected override void UpdateState(BoundUserInterfaceState state)
@@ -50,13 +49,5 @@ namespace Content.Client.Lathe.UI
                     break;
             }
         }
-
-        protected override void Dispose(bool disposing)
-        {
-            base.Dispose(disposing);
-            if (!disposing)
-                return;
-            _menu?.Dispose();
-        }
     }
 }