(#) Even if WEBP usage is switched off (again) fallback is made for already uploaded WEBP images

(+) The edit form shows the file name of uploaded image for image fields (front-end: from user's standpoint)
webp browser fallback if support is not available

temporary stored images are still in original file type and first stored additionally as webp if entry is saved;
original images will also be deleted (not only webp) if a new image is uploaded

   	(!) Content of general CSS class field not added to the entry form for Button and Url Fields (have their own specific classes to use)

Template: (+) Support for Contactform Field

    (#) Parts of the modal window won't be removed if updating repository is cancelled
    (#) JResponse::setBody() not longer available
   	(!) Some language strings for updating repository improved