Bug 12265: Improve Z39.50 servers administration

Bug 12265: Improve Z39.50 servers administration

This patch makes a few tiny improvements on the form, does some
housekeeping/tidying up, and replaces SQL code by DBIC statements.
In detail:
- Adds an id parameter (more precise than searchfield).
- With the move from searchfield to id, you can rename a server now.
- A Copy button is added to clone a server.
- Confirming a delete is moved to javascript. No additional form anymore.
- A message about an insert, update or delete is shown in a div dialog
  alert above the table instead of a separate form.
- Remove offset parameter, Next/Prev button and associated logic.
- All SQL statements are replaced by DBIC.
- Function StringSearch is renamed to DBICified ServerSearch.
- Remove tabs from script and template. Adjust some indentation.

Test plan:
- Test adding, editing and deleting Z3950 servers.
- Test searching for a server with the top search box (not table).
- Add a server with quotes in the name. Search for it. Edit or delete.

Followed tet plan. Patch behaves as expected.
Signed-off-by: Marc Veron <veron@veron.ch>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>