move delete dialog and thread script into the content block in thread view

app/templates/threads/thread.html

@@ -57,7 +57,6 @@
   <h1>Respond to "{{ thread.title }}"</h1>
   {{ babycode_editor_form(ta_name = "post_content")}}
 {% endif %}
-{% endblock %}
 <dialog id="delete-dialog">
   <div class=delete-dialog-inner>
     Are you sure you want to delete the highlighted post?
@@ -69,3 +68,4 @@
   </div>
 </dialog>
 <script src="/static/js/thread.js?v=1"></script>
+{% endblock %}