cubicweb-datacat #8357449 dataset edit form does not load when catalog is related to a large concept scheme [validation pending]

for instance interdoc vocabulary, this occurs when the form field is attributes section.

priorityimportant
typebug
done in0.5.0
load1.000
load left0.000
closed by#1a06fe086506 [views] Move dcat_theme relation to relations section of autoform
patch[views] Move dcat_theme relation to relations section of autoform [applied]