Before this PR, users with the page.edit permission can edit container pages. Instead of that the page.edit_head permission should apply and now does with this PR.
The permission concerning page/norm/variant are a mess (#572) and we will not be able to fix it here. So I only fixed the error message in page.edit_head. Merging.
Before this PR, users with the
page.edit
permission can edit container pages. Instead of that thepage.edit_head
permission should apply and now does with this PR.