Flatpacks and the Flatpacker 1001 (#23338)

* Flatpacker and flatpacks

* ok that's good enough

* convert solars/AME to flatpacks

* mats, mats, we are the mats

* basic mechanics are DONE

* thing

* final UI

* sloth

* rped jumpscare

* rename

Content.Client/Materials/UI/MaterialStorageControl.xaml.cs

@@ -37,9 +37,9 @@ public sealed partial class MaterialStorageControl : BoxContainer
         if (_owner == null)
             return;
 
-        if (!_entityManager.TryGetComponent<MaterialStorageComponent>(_owner, out var materialStorage))
+        if (_entityManager.Deleted(_owner) || !_entityManager.TryGetComponent<MaterialStorageComponent>(_owner, out var materialStorage))
         {
-            Dispose();
+            _owner = null;
             return;
         }