Prefix cookies with a configurable string to allow multiple instances on the same hostname
Allow addition of multiple RDE rows in one action

WIP allow basic fill of a RDE column

WIP basic js refactor to introduce contexts for setting up each fill form

WIP introduce basic sequence form (not working yet)

Add ability to apply a sequence to a RDE column

WIP remove reliance of column indexes from RDE javascript

WIP add ability to reorder columns

Re-enable sticky columns, remove unrequired js/css, and allow toggle between the fill and reorder panels

I18n all new RDE strings

Fix sequence fill.. still refering to indexes

Rebuild the section header row when the columns are reordered
Add new RDE selenium tests.. plus fix add-row not working in firefox
Fixes for update monitor polling

  * Don't use httponly for session cookies.  We need access to sessions from AJAX.

  * Don't apply CSRF protection to the "poll" method, since it zaps the session
    when it fails.
Get the seleniums tests running again...

1) re-add the jquery-ujs resource to application.js - this is the unobtrusive brains of rails, which we use for a few actions
2) ensure the CSRF token is added to the request when a jquery $.ajax POST is performed
Limit the number of values returned by the generate sequence endpoint - limit to the number of rows in the RDE form (or 1000)
Add some more RDE help text
Merge pull request #593 from hudmol/new-rde-features

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