In creative mode, selecting an item in the inventory GUI and then closing it doesn't delete the item. When you open up the inventory GUI again the item is still there, selected.

What I expected to happen was...:
The item should be gone once it's selected and then the inventory GUI is closed and then reopened.

What actually happened was...:
Instead, reopening the inventory GUI still has the item there, selected.

Steps to Reproduce:
1. Get any item from the creative inventory.
2. Select it, then close the inventory GUI.
3. Reopen the inventory GUI and as you can see the item is still there and isn't gone.