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/Chemistry/UI/ChemMasterBoundUserInterface.cs

@@ -2,6 +2,7 @@ using Content.Shared.Chemistry;
 using Content.Shared.Containers.ItemSlots;
 using JetBrains.Annotations;
 using Robust.Client.GameObjects;
+using Robust.Client.UserInterface;
 
 namespace Content.Client.Chemistry.UI
 {
@@ -27,13 +28,8 @@ namespace Content.Client.Chemistry.UI
             base.Open();
 
             // Setup window layout/elements
-            _window = new ChemMasterWindow
-            {
-                Title = EntMan.GetComponent<MetaDataComponent>(Owner).EntityName,
-            };
-
-            _window.OpenCentered();
-            _window.OnClose += Close;
+            _window = this.CreateWindow<ChemMasterWindow>();
+            _window.Title = EntMan.GetComponent<MetaDataComponent>(Owner).EntityName;
 
             // Setup static button actions.
             _window.InputEjectButton.OnPressed += _ => SendMessage(
@@ -75,15 +71,5 @@ namespace Content.Client.Chemistry.UI
 
             _window?.UpdateState(castState); // Update window state
         }
-
-        protected override void Dispose(bool disposing)
-        {
-            base.Dispose(disposing);
-
-            if (disposing)
-            {
-                _window?.Dispose();
-            }
-        }
     }
 }