Hide page link edit button for observers wihout change/edit permission

[MizukiTemma]

Describe the Bug

An edit-button (pen icon) next to the page link is shown in the page form for observer users, even when they do not have permission to edit the page.
Since it does not make sense to show this icon while the user is not allowed to change/edit the page, it should be hidden when changing/editing permission is not granted.

Steps to Reproduce

1. Log in as observer.
2. Go to a page for which this observer does not have permission to change/edit.
3. See the edit-icon is shown.

Expected Behavior

The edit icon is not shown if the observer user cannot change/edit the page.

Actual Behavior

The edit icon is shown even if they cannot change/edit the page.

Additional Information

In the pages which are shared with the observer (for exmaple by page-specific permission) the button should appear.

Traceback