Group description and picture is no longer displayed when filtering participants by group

Group description and picture is no longer displayed when filtering participants by group

As found by lsansone in MDLQA-15531, the group description and picture is not displayed on the Participants page when filtering by group.

Steps to reproduce:

1. Create a course with groups mode set to visible groups.
2. Create a group with a description and picture.
3. Go to the participants page and filter by the group you created.

Expected result:

When filtered by group, the group description and picture is displayed at the top of the page.

Actual result:

The group description and picture is not displayed.