Permissions: disable/hide section, column, tab#12

Depending on the current user role, it should be possible to disable or hide sections, columns and tabs.

The ‘Panel-View-Extended’ plugin should be part of the core. https://github.com/mullema/k3-panel-view-extended

It’s already possible to do this using the Panel View Extended plugin, and custom CSS.

This suggestion maybe should be merged with https://kirby.nolt.io/129

The ideas can’t be merged as they are about different kinds of permissions. I’ve added a link back to this idea so we can keep track of both.