[activesync] Fix refreshing the folder after changing the filter type
minor unit test fixes,  small paranoia change, add comment
Merge pull request #4 from asutherland/as-change-filter-review

minor unit test fixes,  small paranoia change, add comment
Merge pull request #116 from mozsquib/as-change-filter

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