Groups can be limited to printers and whole locations, managed on the new
Printer access page, and jobs can wait for staff review before they print.
Merging onto the current dev:
- The Printer Locations page keeps to the same access rules: a rename keeps
its groups' access, deleting a granted location or moving printers into or
out of one needs an admin and drops the stale grant, and a user limited to
some printers sees and changes only their own locations.
- The overlay logo checks its token without a printer, which the stricter
overlay check now needs and the logo route doesn't have.