bug with variable widget_type

Variable “widget_type” does not exist in SonataAdminBundle:Form:filter_admin_fields.html.twig
* http://stackoverflow.com/questions/23004015/variable-widget-type-does-not-exist-in-sonataadminbundleformfilter-admin-fie

* http://stackoverflow.com/questions/22985378/sonata-admin-filters-should-looks-like-set-of-checkboxes-but-got-error
fix typo
Merge pull request #2202 from lowki93/documentation_improvements

fix typo
Revert "Always add 'form-control' class to select boxes"

This reverts commit 796ebd23c5243bdb9f16ab9c9bfe7dad92b86d51.
fix issue with multiple fields identifier
Fix command for SF2.5
Merge pull request #2067 from BupycHuk/patch-2

bug with variable widget_type
Merge remote-tracking branch 'origin/master'