With this change it is now possible for Menu Installer to specify as its target a menu installed by another Menu Installer, or a submenu thereof. This allows prefabs to inject extension entries into other prefab menus.
Previously, processing would abort before clearing AvatarTagComponents when an exception
is thrown. This would result in unprocessed AvatarTagComponents re-triggering processing
as part of their Awake callback, causing O(n^2) behavior.