Bug 21647: Clean up SRU fields mapping templates

Bug 21647: Clean up SRU fields mapping templates

This patch makes corrections to the SRU field mapping templates
(bibliographic and authority):

 - Bootstrap grid
 - JavaScript to the footer
 - Other markup corrections

To test, apply the patch and go to Administration -> Z39.50/SRU servers

- Add or edit an SRU server
  - Click "Modify" next to the SRU search fields mapping field.
    - Confirm that the popup window layout is correct.
    - Confirm that adding information to the form is correctly saved to
      the SRU server form.
    - Test this process with SRU server record type set to both
      "Authority" and "Bibliographic."

Signed-off-by: Charles Farmer <charles.farmer@inLibro.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>