Fixed typeahead with reverse proxy

fixed marking of tags in advanced search
seperated js and html

cps/templates/book_edit.html

@@ -4,7 +4,7 @@
 <div class="col-sm-3 col-lg-3 col-xs-12">
   <div class="cover">
     {% if book.has_cover %}
-      <img src="{{ url_for('get_cover', cover_path=book.path) }}" />
+      <img src="{{ url_for('get_cover', cover_path=book.path.replace('\\','/')) }}" />
     {% else %}
       <img src="{{ url_for('static', filename='generic_cover.jpg') }}" />
     {% endif %}