Tweak how we use DB session to fetch grid settings

tailbone/newgrids/core.py

@@ -250,7 +250,11 @@ class Grid(object):
         if not user:
             return False
 
-        session = getattr(self, 'session', Session())
+        # NOTE: we used to leverage `self.session` here, but sometimes we might
+        # be showing a grid of data from another system...so always use
+        # Tailbone Session now, for the settings.  hopefully that didn't break
+        # anything...
+        session = Session()
         if user not in session:
             user = session.merge(user)