burs/index: format update scripts as dtext, same as forum.

Format scripts on the BUR index page as dtext, the same way they're
formatted in forum posts. This means that tags have colors and underlines,
but they don't have post counts. Gathering post counts was too slow.

app/views/bulk_update_requests/_listing.html.erb

@@ -1,3 +1,5 @@
+<% dtext_data = DText.preprocess(bulk_update_requests.map(&:script_with_links)) %>
+
 <%= table_for bulk_update_requests, width: "100%" do |t| %>
   <% t.column "Request" do |request| %>
       <% if request.forum_post.present? %>
@@ -6,7 +8,9 @@
         <p><%= link_to "Topic ##{request.forum_topic_id}: #{request.forum_topic.title}", request.forum_topic %></p>
       <% end %>
 
-      <%= script_with_line_breaks(request.script) %>
+      <div class="prose">
+        <%= format_text(request.script_with_links, data: dtext_data) %>
+      </div>
   <% end %>
   <% t.column "Votes" do |request| %>
     <% if request.forum_post.present? %>