cubicweb #2093250 PrimaryView.skip_none does not work [validation pending]

It seems to me that the advertised PrimaryView.skip_none does not work nowadays. The breakage seems to be related to the introduction of reledit which broke the test comparing value to None or an empty string (because value is always a large bit of html dealing with the reledit of the attribute.

done in3.14.4
load left0.000
closed by#f5f874d8a4f4 [primary view] delete PrimaryView.skip_none attribute (closes #2093250)