Remember previous tag selection

internewshid/hid/templates/hid/tabs/filters/tags.html

 {% load i18n %}
 <div class="filter-tags form-group input-group">
   <label class="control-label" for="tags-selector">{% trans "Tags" %}</label>
-  <input type="text" placeholder="All Tags" name="tags" class="form-control">
+  <input type="text" placeholder="All Tags" name="tags" class="form-control" value="{{ filters.tags }}">
 </div>