Cursor remains in gizmo hover state after deleting an object

Description:
If the cursor is hovering over an object's gizmo when the object is deleted, the cursor remains in the gizmo hover state even though the gizmo no longer exists.

Steps to reproduce:

1. Select an object with visible gizmos

2. Hover the mouse over one of the gizmos

3. Delete the object while the cursor is still hovering over the gizmo

Actual behavior:
The cursor remains in the gizmo hover state after the object has been deleted.

Expected behavior:
The cursor should immediately return to its default state when the object and its gizmos are deleted.