Show that user is already blocked on Abuse Reports

app/views/admin/abuse_reports/_abuse_report.html.haml

@@ -25,4 +25,7 @@
   %td
     - if user && !user.blocked?
       = link_to 'Block user', block_admin_user_path(user), data: {confirm: 'USER WILL BE BLOCKED! Are you sure?'}, method: :put, class: "btn btn-xs"
+    - else
+      .btn.btn-xs
+        Already Blocked
     = link_to 'Remove report', [:admin, abuse_report], remote: true, method: :delete, class: "btn btn-xs btn-close js-remove-tr"