Bug 21030: Date widget on suspend modal not working correctly

This patch makes a change to the suspend hold modal markup in order to
allow the datepicker <selects> to work properly.

To test, apply the patch and locate a patron in the staff client who has
holds.

 - On the checkout or patron detail page, open the holds tab.
 - Click the "Suspend" button for one of the holds.
 - In the modal, trigger the date picker and confirm that the dropdowns
   for selecting month and year work correctly.

Signed-off-by: Pierre-Marc Thibault <pierre-marc.thibault@inLibro.com>

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit c91c1a69a2)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit 2084f0e3cb)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>

koha-tmpl/intranet-tmpl/prog/js/holds.js

@@ -229,7 +229,7 @@ $(document).ready(function() {
     }
 
     $("body").append("\
-        <div id='suspend-modal' class='modal fade' tabindex='-1' role='dialog' aria-hidden='true'>\
+        <div id='suspend-modal' class='modal fade' role='dialog' aria-hidden='true'>\
             <div class='modal-dialog'>\
             <div class='modal-content'>\
             <form id='suspend-modal-form' class='form-inline'>\