Support arbitrary depth of dependsOn fields (#34)

Fixes #8. Credit to @meesiris!

Author: meesiris

modules/backend/widgets/form/assets/js/winter.form.js

@@ -154,6 +154,7 @@
                 data: refreshData
             }).success(function() {
                 self.toggleEmptyTabs()
+                $('[data-field-name="' + toRefresh.fields[0] + '"]').trigger('change')
             })
         }, this.dependantUpdateInterval)