[FIX] project: remove group_by from the context

The group_by was passed from context from the action spawning a new view.
This meant that it could give a group_by a field that was not defined on the
destination view, causing a js traceback.

opw 1884035

addons/project/models/project.py

@@ -399,6 +399,7 @@ class Project(models.Model):
         action_context = safe_eval(action['context']) if action['context'] else {}
         action_context.update(self._context)
         action_context['search_default_parent_res_name'] = self.name
+        action_context.pop('group_by', None)
         return dict(action, context=action_context)
 
     # ---------------------------------------------------