Bug 29186: Move reports result limit menu into toolbar

Bug 29186: Move reports result limit menu into toolbar

This patch creates a new Bootstrap button menu for selecting the number
of search results to be shown. This replaces the HTML <select>.

To test, apply the patch and go to Reports -> Saved reports.

- Test the appearance and functionality of the "Rows per page" button in
  various situations:
  - A report that returns more than 10 results
  - A report that returns fewer than 10 results
  - A report that returns no results
- Test that the batch operations button menu appears correctly when
  there are biblionumbers, itemnumbers, or cardnumbers in the results.
- When there are no results, or fewer than 10 results with no batch
  operations possible the toolbar shouldn't appear at all.

Signed-off-by: George Williams <george@nekls.org>
Signed-off-by: George Williams <george@nekls.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>