Follow-up to design discussions here at the studio, add liboverride
operations into their own sub-menu, with three main entries:
- Create: Create, or enable for user editing, override hierarchies.
- Reset: Keep overrides data, but reset all local changes to the
reference linked data values.
- Clear: like reset, but also turn editable overrides back to system
overrides (aka non user editable).
Those three options can all operate either on the selected items, their
content only, or both.
Advanced operations are moved into a "Troubleshoot Hierarchy" sub-menu,
where one can resync, resync enforced, and fully delete library
overrides. Those operations always affect a whole override hierarchy,
regardless of which items are selected or not.
c73cc15e07