If you use a 'Flexbox layout' element in a a webform it doesn't get displayed properly.
It relies on a class attribute of 'webform-flexbox'.
By default Civictheme throws this attribute away in 'civictheme_convert_attributes_to_modifier_class' and
doesn't replace it with anything equivalent.
Create a webform, add a 'Flexbox layout' element, add 1 or 2 child elements to it. Observe lack of flex.
Introduce 'modifier_class' for webform-flexbox or exclude it from the attribute convert.
Active
1.8
Code
We are making changes to how form's behave in 1.9 to fallback to Drupal if CivicTheme does not support a form element but this is not a form element we have plans for delivering first party support for at the moment.