Non-Admin users can edit the application

Normal users (with edit permissions but without admin/programming rights) have the link "Edit application" available and can actually do it. With a normal user I was able to add and delete fields of the application which destroys the idea details page completely. Due to the fact that applications don't have a history only fix is un- and re-installing the ideas application.

Even excluding those rights to the ideas main page

Users without programming permissions should only be allowed to add new ideas.