Bug 18708 [Revised] Show itemBarcodeFallbackSearch results in a modal window

Bug 18708 [Revised] Show itemBarcodeFallbackSearch results in a modal window

This patch modifies the circulation template so that
itemBarcodeFallbackSearch results show in a modal window.

To test, enable the itemBarcodeFallbackSearch system preference and open
a patron's account in circulation.

- Submit a string which will return search results. When the page
  reloads a modal should display showing a table of title search
  results.
  - Test the "Check out" button and confirm that the correct item is
    submitted.
  - Test closing the modal and re-displaying it using the new "Show
    matching titles" button.
  - Confirm that the "Add record using fast cataloging" button still
    works correctly.
- Submit a string which will return no results. No modal window should
  display, and only the "Add record" button should appear.
- Confirm that normal checkout works correctly.
- Test with itemBarcodeFallbackSearch disabled, and with a user who
  lacks Fast Cataloging permission.

Revision removes a heading which was made redundant by the modal markup.

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>