Bug 24336: Ask for confirmation before deleting a suggestion in the OPAC

Bug 24336: Ask for confirmation before deleting a suggestion in the OPAC

This patch modifies the OPAC suggestions interface so that patrons will
be asked for confirmation before deleting suggestions.

The patch also makes some minor markup changes to improve consistency
between this interface and others in the OPAC.

To test, apply the patch and log in to the OPAC as a user who has
submitted multiple suggestions.

 - From the list of your suggestions, confirm that the "New purchase
   suggestion" and "Delete" links have Font Awesome icons.
 - Check the checkbox corresponding to one of your suggestions. You can
   also now click the title of the suggestions to control the checkbox.
 - When you check a box the "Delete" link at the top of the page should
   activate.
 - Clicking the delete link should trigger a confirmation modal showing
   the title(s) you selected.
   - The message and button labels should reflect whether one or
     multiple titles are being deleted.
   - Test that the confirm and cancel controls work correctly.
 - Also test this process via the delete button at the bottom of the
   table of suggestions.

Signed-off-by: Maryse Simard <maryse.simard@inlibro.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>