Replace is_admin() with current_user_can('administrator')

[robbinrietdijk]

In the PluginConfiguration class the function userIsAdmin() suggests a check for the current user having an admin role in WordPress. The WordPress function is_admin() doesn't check a users role, this function returns true for admin pages.

"Determines whether the current request is for an administrative interface page. Does not check if the user is an administrator; use current_user_can() for checking roles and capabilities."

See https://developer.wordpress.org/reference/functions/is_admin/

[jkva]

Ah, yeah. Good spot. I remember using current_user_can in another project for that same reason. I do recall finding it a bit vague in which capabilities one needs to evaluate. If you have suggestions, please add them to this issue 👍

[robbinrietdijk]

Renamed the issue and assigned myself to it

[jkva]

Closing as #123 was merged.