7.15.0

Feature

• Added missing components for Email and Url widgets #1246 @rexalex
• Show backend validation errors on corresponding fields #1246 @rexalex
• Validation implemented for add user/group @rexalex
• Show Username when Firstname attr is missing in UsersControlPanelUser @iFlameing

Bugfix

• Fixed front-end field validation #1246 @rexalex
• Fixed date only widget rendering #1246 @rexalex
• Fix errors with SelectWidget when removing the only element @rexalex