[Delivers #51853907 #51854067 #59972370] RDE enhancements, prefixed cookie, CSRF tokens for ajax

RDE enhancements
 - allow fill of a column with a single value
 - allow fill of a column with a sequence
 - allow reorder of columns
 - allow addition of multiple rows in a single action

Prefixed cookies
 - cookies are now prefixed so they can be distinguished for an ASpace instance that shares the same domain but have different ports.

CSRF tokens
 - ensure the CSRF token is appended an AJAX post request.  This was causing Rails to sometimes drop the user session