dmails: fix respond links being shown to non-owner on show page.

app/views/dmails/show.html.erb

@@ -24,6 +24,7 @@
         <% end %>
       </div>
 
+      <% if CurrentUser.user == @dmail.owner %>
         <p>
           <%= link_to "Respond", new_dmail_path(:respond_to_id => @dmail) %>
           | <%= link_to "Forward", new_dmail_path(:respond_to_id => @dmail, :forward => true) %>
@@ -32,6 +33,7 @@
             | <%= link_to "Report", new_moderation_report_path(moderation_report: { model_type: "Dmail", model_id: @dmail.id }), remote: true, title: "Report this dmail to the moderators" %>
           <% end %>
         </p>
+      <% end %>
     </div>
   </div>
 </div>