Revert "Remove some BUI boilerplate" (#30214)

Revert "Remove some BUI boilerplate (#28399)"

This reverts commit cbf329a82d.

Content.Client/Store/Ui/StoreBoundUserInterface.cs

@@ -2,7 +2,6 @@ using Content.Shared.Store;
 using JetBrains.Annotations;
 using System.Linq;
 using Content.Shared.Store.Components;
-using Robust.Client.UserInterface;
 using Robust.Shared.Prototypes;
 
 namespace Content.Client.Store.Ui;
@@ -27,10 +26,13 @@ public sealed class StoreBoundUserInterface : BoundUserInterface
 
     protected override void Open()
     {
-        _menu = this.CreateWindow<StoreMenu>();
+        _menu = new StoreMenu();
         if (EntMan.TryGetComponent<StoreComponent>(Owner, out var store))
             _menu.Title = Loc.GetString(store.Name);
 
+        _menu.OpenCentered();
+        _menu.OnClose += Close;
+
         _menu.OnListingButtonPressed += (_, listing) =>
         {
             SendMessage(new StoreBuyListingMessage(listing));
@@ -75,6 +77,15 @@ public sealed class StoreBoundUserInterface : BoundUserInterface
         }
     }
 
+    protected override void Dispose(bool disposing)
+    {
+        base.Dispose(disposing);
+        if (!disposing)
+            return;
+        _menu?.Close();
+        _menu?.Dispose();
+    }
+
     private void UpdateListingsWithSearchFilter()
     {
         if (_menu == null)