[web/views/formrenderer] remove `cubicweb:target` attribute on form once the target <iframe> is inserted For some unknown reason, IE9 does not want to submit the form inside the <iframe> when the ``cubicweb:target`` attribute exists. (closes #5377672)

version=3
opts=uversionmangle=s/(rc|a|b|c)/~$1/ \
http://pypi.debian.net/cubicweb/cubicweb-(.+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))