Bug: Associations tab on images/waypoint edition

[cbeauchesne]

Describe the bug
Regular users can't remove waypoint/images associations => remove the "delete" button on edit pages :

To Reproduce
Steps to reproduce the behavior:

1. connect as regular user
2. edit a waypoint with associated images
3. go to association tab
4. click on delete button => API rejection

Expected behavior
No delete button

Additional context
The logic behind allowed action is present in association windows, please do not replicate it :)