When you aren't allowed to edit / delete a page or collection you still see the icons

[Kristina Hoeppner]

Tested in Mahara 16.10 and a patch in review for 17.04:

Test case:

1. A group admin sets up the group so that regular group members cannot edit pages.
2. Group admin creates a page.
3. Regular group member sees the "Edit" and "Delete" buttons.
4. When regular group member clicks on the buttons, they get "Access denied".

Expected result: Group member doesn't see the "Edit" and "Delete" buttons. This may have snug in with the Bootstrap update as I don't remember having seen the buttons in earlier versions of Mahara.