Enable permissions for Fieldsets

[elabx]

Short description of the issue

Fieldsets should also have their access permissions by role even if only for the view permissions.

Expected behavior

I should be able to make fieldset not-viewable and make them viewable by role. My most recurring scenario is grouping a specific set of fields that have field to edit Less/CSS files, that want only visible for certain roles.

Actual behavior

Settings can be set from the API and it apparently works ok.