Show group membership(s) in user-summary and user-list

app/Helper/UserHelper.php

@@ -109,6 +109,18 @@ class UserHelper extends Base
         return $this->role->getRoleName($role ?: $this->userSession->getRole());
     }
 
+    /**
+     * Get group names(as a comma-separated list) for a given user
+     *
+     * @access public
+     * @param  integer   $user_id   User id
+     * @return string
+     */
+    public function getGroupNames($user_id)
+    {
+        return implode(', ', array_column($this->groupMemberModel->getGroups($user_id), 'name'));
+    }
+
     /**
      * Check application access
      *