Unable to hide-summary and open collapsed fieldset on node edit page

[pbuyle]

When editing a session with the default theme (ie. not the admin theme), the "Hide Summary" link for the body field and the "Materials" field-group label does not work to hide/toggle the fields.

There seems to be an issue with Bootstrap's JavaScript (either the from base theme or from Bootstrap itself) .

• https://www.drupal.org/node/2224211
• https://www.drupal.org/node/2136839

The issue with the Hide Summary is non-blocking, and I temporarly removed any collapsible fieldset from the Session content type. But this need to be fixed in order to provide a pleasant user experience.

[pbuyle]

This is fixed with the new theme.