Since commit 11857adec0 the invisible form
widgets are not rendered at all. This caused an issue in the document
layout designer where the "custom_colors" field was invisible but still
referenced by a label with a "for" attribute.
Now, said field is not completely invisible anymore; it is set with
"display:none" instead to be rendered invisible and interactive as
before.
closesodoo/odoo#55970
Task: 2320982
Signed-off-by: Lucas Perais (lpe) <lpe@odoo.com>