Comment 8 for bug 1490569

For testing, here is a guide for verify the list of shared pages

1. Create a group
2. Add some users to the group
3. Login as a group member, create some pages and shared them to the group
4. Login as a group owner, edit the group homepage, reconfigure the "Group pages" block, select the sort type of shared pages
5. Save the group home page

Make sure the list of shared pages is correctly sorted.