Bug 10010 - Use jQueryUI Accordion to display constraints in MARC subfield editor

The jQueryUI Accordion widget, included by default in Koha, is
well-suited to handle the kind of show/hide actions which are used in
the MARC subfield editor. This patch replaces the custom-writted JS with
jQueryUI JS and markup.

To test, load the tag subfield editor: Admin -> MARC frameworks -> MARC
structure -> Subfields -> Edit. Confirm that basic, advanced, and other
contraints panels are show/hidden correctly. Confirm that tabs work, and
that edit operations are not disrupted.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Looks nice, passes all tests and QA script.
Signed-off-by: Galen Charlton <gmc@esilibrary.com>