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/Research/UI/ResearchClientServerSelectionMenu.xaml.cs

@@ -13,27 +13,26 @@ namespace Content.Client.Research.UI
         private int[] _serverIds = Array.Empty<int>();
         private int _selectedServerId = -1;
 
-        private ResearchClientBoundUserInterface Owner { get; }
+        public event Action<int>? OnServerSelected;
+        public event Action? OnServerDeselected;
 
-        public ResearchClientServerSelectionMenu(ResearchClientBoundUserInterface owner)
+        public ResearchClientServerSelectionMenu()
         {
             RobustXamlLoader.Load(this);
             IoCManager.InjectDependencies(this);
 
-            Owner = owner;
-
             Servers.OnItemSelected += OnItemSelected;
             Servers.OnItemDeselected += OnItemDeselected;
         }
 
         public void OnItemSelected(ItemList.ItemListSelectedEventArgs itemListSelectedEventArgs)
         {
-            Owner.SelectServer(_serverIds[itemListSelectedEventArgs.ItemIndex]);
+            OnServerSelected?.Invoke(_serverIds[itemListSelectedEventArgs.ItemIndex]);
         }
 
         public void OnItemDeselected(ItemList.ItemListDeselectedEventArgs itemListDeselectedEventArgs)
         {
-            Owner.DeselectServer();
+            OnServerDeselected?.Invoke();
         }
 
         public void Populate(int serverCount, string[] serverNames, int[] serverIds, int selectedServerId)