updateWidget() for attribute 'klass' returns KeyError if widget is in a sub-fieldset #2
Description
Referring to:
http://stackoverflow.com/questions/15385575/plone-4-dexterity-viewform-add-css-class-to-widget-in-fieldset-x
It seems that there is a problem with updating a widget's klass-attribute, if the widget lives in a fieldset that is hidden.
Maybe a javascript cannot find an element when hidden?
This is not an urgent issue at all to me, but reporting it for records :)