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/Access/UI/AgentIDCardBoundUserInterface.cs

@@ -1,6 +1,7 @@
 using Content.Shared.Access.Systems;
 using Content.Shared.StatusIcon;
 using Robust.Client.GameObjects;
+using Robust.Client.UserInterface;
 using Robust.Shared.Prototypes;
 
 namespace Content.Client.Access.UI
@@ -20,16 +21,11 @@ namespace Content.Client.Access.UI
         {
             base.Open();
 
-            _window?.Dispose();
-            _window = new AgentIDCardWindow(this);
-            if (State != null)
-                UpdateState(State);
+            _window = this.CreateWindow<AgentIDCardWindow>();
 
-            _window.OpenCentered();
-
-            _window.OnClose += Close;
             _window.OnNameChanged += OnNameChanged;
             _window.OnJobChanged += OnJobChanged;
+            _window.OnJobIconChanged += OnJobIconChanged;
         }
 
         private void OnNameChanged(string newName)
@@ -61,14 +57,5 @@ namespace Content.Client.Access.UI
             _window.SetCurrentJob(cast.CurrentJob);
             _window.SetAllowedIcons(cast.Icons, cast.CurrentJobIconId);
         }
-
-        protected override void Dispose(bool disposing)
-        {
-            base.Dispose(disposing);
-            if (!disposing)
-                return;
-
-            _window?.Dispose();
-        }
     }
 }