added listfields JField has new mode=gui property - replaces standard dropdown list of fields with textarea, addbutton and a list. You can then freetype in the field name or add via a selection. Used for dbjoin element so that its description option can use placeholders in the field name (for language switching use {lang} as placeholder
Merge branch 'joomla3' of github.com:Fabrik/fabrik into joomla3
fixed admin ajax js error in edit element if loading a list with unpublished dbjoin element
fixes #925