Most tables now occupy the full width of the container row. Some of
them are otherwise squished. Also make sure the new fixed container
layout has not reduced the originally intended width of a table.
- 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
