Revise selectors when offline/online situations

Hi,

To reproduce it on forums (Detected while testing MOBILE-4031)

1. Download a forum
2. Go offline
3. Open the forum you just downloaded. Check that the data is loaded and no error is displayed.
4. Change sort order/groups selected. See that an error is displayed (we only prefetch the selected sort order).
5. Go online again see that the sort order/groups selected is the one of step 4 but the content is the one from step 3

It is a more generic thing around the app.