A user should be able to revert to the previous version of a Schema via the usual undo, restore, or rollback actions.
GIVEN a change has been made on a Shex
AND the user is allowed to make changes
THEN they can select the desired version
AND see the shape expression was reverted to that version
- A user can select version to revert to
- A user can revert to that version
NOTE: restore is a separate task now, T214915.