Before it only listed files in current directory. Because of the hard
split select from both.
Add hostname/folder input (optional) to prefix files outside the same
folder.
Note: If no hostname/folder is set and two files in admin and frontend
have the same name they will be both highlighted as the point to the
same place.
- reference save was not 100% correct with isset/empty checks
- more missing fixes in admin_*inc files for non edit_* pages
- non edit page menu build fix
- fix non set smart core vars
- add update SQL for fixing missing cuid in edit_* tables
