Bug 29015: Add options for itemtype, collection, and shelving location to view_holdsq...

Bug 29015: Add options for itemtype, collection, and shelving location to view_holdsqueue.pl

This patch makes the code for itemtypeslimit work, and adds options for shelving location and collection code

This also remove the 'post' method from the form to allow easy bookmarking

To test:
1 - Add holds to your system
2 - Run the holds queue builder
3 - Browse to Circulation->Holds queue
4 - Note the library dropdown
5 - Apply patch
6 - Reload and note new options
7 - Test that both limits and 'All' options work as expected
8 - Note that description at top includes options when selected
    "### items found for All libraries and item type:(Books)"

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>