Bug 16060 - Add Font Awesome icon to Z39.50 search button when no results are found

Bug 16060 - Add Font Awesome icon to Z39.50 search button when no results are found

When a staff client catalog search returns no results, a Z39.50/SRU
search button is shown. This patch adds a Font Awesome icon to that
button.

Also changed: A stray extra double quote has been removed. The onclick
attribute has been removed from the search button in favor of an event
already defined.

To test, apply the patch and perform a search in the staff client
catalog which will return no results.

- Confirm that the Z39.50/SRU button looks correct and works correctly.
- Validate the HTML of the page and confirm that no unexpected errors
  are returned.

NOTE: Pretty!

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com