Fix bug when request.user becomes unattached from session (?)

this sure seems unexpected.  so far the behavior has only been seen on
mobile when a new ordering batch was created

tailbone/views/core.py

@@ -47,7 +47,12 @@ class View(object):
         self.request = request
 
         # if user becomes inactive while logged in, log them out
-        if getattr(request, 'user', None) and not request.user.active:
+        if getattr(request, 'user', None):
+            # TODO: why is the user sometimes not attached to session?
+            # (this has only been seen on mobile, when creating a new ordering batch)
+            if request.user not in Session():
+                request.user = Session.merge(request.user)
+            if not request.user.active:
                 headers = logout_user(request)
                 raise self.redirect(request.route_url('home'))