New features
[c5563ee] Allowed to translate the labels and help messages of the form groups (Jan Sabat)
Bug fixes
[ecc8e40] Fixed Twig namespaced syntax (@appbundle should be @app) (@Pierstoval)
[35853fc] Fixed transchoice translation in show template (@forsetius)
[e856033] Fixed the title of the list template when using HTML tags (@anthony-launay)
[dc3b62b] Fixed the documentation about custom actions (@hhamon)
[a56532d] Made the HTML of the forms valid when using form groups by removing field attributes and making use of custom form variables (@ogizanagi)
[c6d469d][497b023] Updated French translation (@anthony-launay)
[d89b27a] Updated Polish translation (@forsetius)
[32c4851] Updated Slovenian translation (@peterkokot)