Bug 37998: Tabs and backslashes in the data break item search display

Bug 37998: Tabs and backslashes in the data break item search display

If the item data (e.g. callnumber) contains a tab or backslash OR the
title part contains a backslash, the DataTable displaying the item
search results stops throwing an error modal "Something went wrong when
loading the table. 200: OK." and a JS console log: "DataTables warning:
table id=results - Invalid JSON response. For more information about
this error, please see http://datatables.net/tn/1".

Test plan:
==========

1. Make an item search w/o any parameters.
2. From the first result page choose a record and modify the title (245 $a)
   to contain " \ " string. Repeat the item search. You should see a modal
   "Something went wrong when loading the table. 200: OK.".
3. Remove the " \ " from the title.  Verify that the problem no longer occurs.
4. In the same record, insert the string " \ " or a tab (copied from a text
   editor) into item data (itemcallnumber, enumchron, barcode etc.).
5. Repeat the item search. You should see again a modal "Something went wrong
   when loading the table. 200: OK.".
6. Apply the patch; restart_all.
7. Repeat p. 2, 3, 4, and 5.  Verify, that the problem is solved.

Sponsored-by: Ignatianum University in Cracow
Signed-off-by: Roman Dolny <roman.dolny@jezuici.pl>
Signed-off-by: Paul Derscheid <paul.derscheid@lmscloud.de>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>