Display if a context question has been deleted when viewing anon blocks

app/views/settings/blocks/index.haml

@@ -25,7 +25,10 @@
         %li.list-group-item
           .d-flex
             %div
+              - if block.question.present?
                 %p.mb-0= block.question.content
+              - else
+                %p.mb-0.text-muted.font-italic= t('.deleted_question')
               %p.text-muted.mb-0= t(".blocked", time: time_ago_in_words(block.created_at))
             .ml-auto.d-inline-flex
               %button.btn.btn-default.align-self-center{ data: { action: "anon-unblock", target: block.id } }

config/locales/views.en.yml

@@ -156,6 +156,7 @@ en:
           anon_blocks:
             heading: "Anonymous Blocks"
             body: "Each anonymous user you've blocked is listed here, along with a way to unblock them.  We also display the question they asked you to add some more context.  You can block anonymous users directly from the question in your inbox."
+        deleted_question: "Deleted question"
     data:
       index:
         title: "Your Data"