Bug 30509: Fix configuration of Notices accordion widget

Bug 30509: Fix configuration of Notices accordion widget

The jQueryUI upgrade broke the Accordion on the notices edit page. I'm
not sure why, but defining a "header" option in the accordion
configuration fixes it.

To test, apply the patch and test the notices edit page both with and
without TranslateNotices and multiple languages installed. In both cases
the different sections (Email, Print, SMS) should open and close
correctly.

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>