Add mising params

app/assets/javascripts/issues-bulk-assignment.js.coffee

@@ -78,9 +78,12 @@ class @IssuableBulkActions
   getFormDataAsObject: ->
     formData =
       update:
-        issues_ids: @form.find('#update_issues_ids').val()
-        add_label_ids: []
-        remove_label_ids: []
+        state_event       : @form.find('input[name="update[state_event]"]').val()
+        assignee_id       : @form.find('input[name="update[assignee_id]"]').val()
+        milestone_id      : @form.find('input[name="update[milestone_id]"]').val()
+        issues_ids        : @form.find('input[name="update[issues_ids]"]').val()
+        add_label_ids     : []
+        remove_label_ids  : []
 
     for id in @getLabelsToApply()
       formData.update.add_label_ids.push id