[activesync] Fix refreshing the folder after changing the filter type

r? @asutherland

This fixes [bug 834448](https://bugzilla.mozilla.org/show_bug.cgi?id=834448), and cleans up a couple of logging things (which aren't tested yet).

Comment out the added line in account.js to see the behavior pre-patch and verify that the test fails before and passes after the changes.