Revert "Remove some BUI boilerplate" (#30214)

Revert "Remove some BUI boilerplate (#28399)"

This reverts commit cbf329a82d.

Content.Client/Labels/UI/HandLabelerBoundUserInterface.cs

@@ -1,7 +1,6 @@
 using Content.Shared.Labels;
 using Content.Shared.Labels.Components;
 using Robust.Client.GameObjects;
-using Robust.Client.UserInterface;
 
 namespace Content.Client.Labels.UI
 {
@@ -24,8 +23,13 @@ namespace Content.Client.Labels.UI
         {
             base.Open();
 
-            _window = this.CreateWindow<HandLabelerWindow>();
+            _window = new HandLabelerWindow();
+            if (State != null)
+                UpdateState(State);
 
+            _window.OpenCentered();
+
+            _window.OnClose += Close;
             _window.OnLabelChanged += OnLabelChanged;
             Reload();
         }
@@ -47,5 +51,13 @@ namespace Content.Client.Labels.UI
 
             _window.SetCurrentLabel(component.AssignedLabel);
         }
+
+        protected override void Dispose(bool disposing)
+        {
+            base.Dispose(disposing);
+            if (!disposing) return;
+            _window?.Dispose();
+        }
     }
+
 }