fix(backgrounds): disallow equipping unowned bashground

Also add missing headers when recording group task creation

website/server/controllers/api-v3/tasks/groups.js

@@ -68,6 +68,7 @@ api.createGroupTasks = {
         category: 'behavior',
         taskType: task.type,
         groupID: group._id,
+        headers: req.headers,
       });
     });
   },