Bug 15471: Add column settings and filters to Holds queue table

Bug 15471: Add column settings and filters to Holds queue table

Add column visibility menu using DataTables Buttons
Add a text filter on top of each column
Also extend page width so that the large table is better centered

Depends on bug 15285

Test plan
1. Go to Holds queue page (circ/view_holdsqueue.pl)
2. Check that table sorting and filtering work well and that you can
   hide each column
3. Go to Admin > Configure columns and change the settings for this
   table (Circulation > view_holdsqueue > holds-table). Verify that the
   settings work by going again to the Holds queue page
4. Check that filters continue to work after hiding some columns

Tested on top of 15285, works as expected.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com