* Check mailbox validity before cursor iterations, 3 tests * msgNumber removed
* Build messageIDs string only for current checked mailbox
* Don't call push HTTP method if there is no messages to sync
Import some SmsFetcher code into SmsDataProvider.
AGPLv3 is better for next published code. I think this will be the licence for many parts of R&D code, but BSD will remain on autogenerated code, layouts and strings