FIX: Ensure subcategory list is hidden when not required (#14424)
When the loading spinner is removed (e.g. via the loading-slider component), the subcategory list view will persist, even when no longer required. This is because we were conditionally rendering the list into the
header-list-container outlet. When the condition was false, we were doing nothing. Instead, we should use
disconectOutlet to make sure the content is removed from the DOM.
GitHub sha: 688e03fc42bddc2544774e74aa45b862144e4e8b