backported element model setFullName() method from 3.1
fixed possible error in password validation element when saving via ajax
fixed: new db join elements would set popup window width to 0 as default - not very sensible. So set to empty as default which then attempts to resize the window to the correct size. Fixed issues with "add in front end" options in repeating groups - would set the added option as active on all database join elements and not just the calling element