Issue #2352163 by SchnWalter: fixed media_wysiwyg replace class selector with data attribute
Issue #2361113 by andypost, rv0, AndreyMaximov: fixed Impossible to save settings for a new Multimedia asset field
Issue #2320535 by justindodge, tom friedhof: fixed Media 7.x-2.0-alpha2 to 7.x-2.x-dev break existing WYSIWYG content