- Move diagnostics into main module instead of action script.
- Ability run diagnostics as non-root user (because it runs in Plinth
instead of action).
- Diagnose whether LDAP server is listening.
- Diagnose directory entities created during setup.
- allows editing users (currently the groups and username)
- allows any logged-in user to change the passwords of any other users
- improved url highlighting of subsubmenu
