Show only relevant should cooperate with core permissions

Problem/Motivation

The entity access group "Show only relevant" under entity access configuration limits the entity reference field on the content being created to the groups the user has access to. It does not present the "No group" option. If the user has been granted "[content type]: Create new content" permission via Drupal core, the user should be able to create content with no group. If, on the other hand, they are ONLY granted CREATE permissions through one or more groups, only the relevant options should appear.

Steps to reproduce

Create a group, use the "Show only relevant" option. Give a group member Drupal core access to create content of a content type indicated in the group. The user is unable to create non-group content.

Proposed resolution

Present the "no group" option to users who have "global" content creation permissions.

This issue is related to the CREATE permissions issue previously submitted.