Fix patches, break in test mode

It seems that in test mode, monkey patch is done after cubicweb.web.views.forms
has been loaded, which hence references the original guess_field (monkey-patched
by cube'site_cubicweb).

Using the proper module fixes the problem.

views/patches.py

@@ -38,6 +38,7 @@ def _build_form(*args, **kwargs):
 # (https://www.cubicweb.org/ticket/14474840)
 # other part in site_cubicweb
 
+from cubicweb.web import formfields  # noqa
 from cubicweb.web.views import forms  # noqa
 
 
@@ -70,7 +71,7 @@ def field_by_name(cls_or_self, name, role=None, eschema=None):
             req = None
         else:
             req = cls_or_self._cw
-        field = forms.guess_field(eschema, rschema, role, req=req, eidparam=True, **kwargs)
+        field = formfields.guess_field(eschema, rschema, role, req=req, eidparam=True, **kwargs)
         if field is None:
             raise
         return field