cubicweb-preview #3216719 Improve API for forms to force iframe for posting [resolved]

This form post method is mandatory with current way to handle the preview display: setting it in the preview form mixin would make it easier to use the preview cube with forms that are not AutomaticEntityForm instances (that use iframe form posting anyway).

prioritynormal
typeenhancement
done in1.1.0
load0.100
load left0.000
closed by#6540ec56e679 Force usage of iframe form posting.
patchForce usage of iframe form posting. [applied]