Accordion toggle links - Missing class (?)

Created by: ChristianAdamski

Comming from Drupal CMS:

If looking at the (section) recent activity: you can toggle the display of further info by clicking n a link. This accordion functionality is happening with Bootstrap collapse.js. Problem: once a toggle-link is clicked (now open) and clicked again (now closed) a class "collapsed" will be added. But it is not present, before open and closed. This is the Bootstrap default behavior, but it's pretty strange, isn't it?

I added the class "collapse" to "accordion-toggle" in views-view-fields--oa-recent-activity--panel-pane.tpl.php

Is the an error in Bootstrap?