Allow teachers to access internal users and manage them in their study groups

app/views/external_users/index.html.slim

@@ -32,12 +32,15 @@ h1 = ExternalUser.model_name.human(count: 2)
       tr
         th = t('activerecord.attributes.external_user.name')
         th = t('activerecord.attributes.external_user.consumer')
+        th = t('activerecord.attributes.external_user.platform_admin')
         th = t('shared.actions')
     tbody
       - @users.each do |user|
         tr
           td = link_to_if(policy(user).show?, user.displayname, user)
           td = link_to_if(user.consumer.present? && policy(user.consumer).show?, user.consumer, user.consumer)
+          - if current_user.admin?
+            td = symbol_for(user.platform_admin?)
           td = link_to(t('shared.show'), user) if policy(user).show?
 
 = render('shared/pagination', collection: @users)

app/views/external_users/show.html.slim

@@ -6,7 +6,7 @@ h1 = @user.displayname
   code
     = @user.external_id
 = row(label: 'external_user.consumer', value: link_to_if(policy(@user.consumer).show?, @user.consumer, @user.consumer))
-= row(label: 'external_user.platform_admin', value: @user.platform_admin?)
+= row(label: 'external_user.platform_admin', value: @user.platform_admin?) if current_user.admin?
 = row(label: 'users.show.study_groups') do
   - visible_memberships = @user.study_group_memberships.select { |study_group_membership| policy(study_group_membership.study_group).show? }
   - if visible_memberships.any?