[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)
[MESSAGES CONTROL]
disable-msg = C0301
[VARIABLES]
# Enable / disable this checker
enable-variables = yes
additional-builtins = _, display_name
[BASIC]
required-attributes=
attr-rgx = (w|[a-z_][a-z0-9_]{2,30})
variable-rgx = (w|[a-z_][a-z0-9_]{2,30})$
argument-rgx = (w|[a-z_][a-z0-9_]{2,30})$
[TYPECHECK]
generated-members=debug,info,notice,warning,error,critical,exception