Empty scripts, comments and search lists

Some users don't have any scripts yet, but an empty sorting table is shown.
Some users don't have any comments yet, but a pager is shown.
When search yield no results, an empty sorting table is shown.

This PR will add an message saying that this user doesn't have any scripts/comments yet, filling up the empty space. Also a message when there are no search results (scripts, libraries & users).
To be clear you want all mustache ifs to be moved to the controller as one mustache tag (e.g. `{{emptyListMessage}}`) ?