qt tx notifications: wait until sync finishes
qt tx notifications: wait until sync finishes

Comment is no longer relevant. Also, actually it was incorrect.
Each txn is only downloaded once, though 'added' multiple times to the wallet.
The triggers are only sent out by the Synchronizer, once, when downloaded.
The actual reason for the inconsistency was that get_wallet_delta can only
give complete results once the wallet is synced.

vialectrum/vialectrum,spesmilo/electrum,pooler/electrum-ltc,spesmilo/electrum,wakiyamap/electrum-mona,vialectrum/vialectrum,neocogent/electrum,cryptapus/electrum,fujicoin/electrum-fjc,wakiyamap/electrum-mona,wakiyamap/electrum-mona,pooler/electrum-ltc,pooler/electrum-ltc,neocogent/electrum,vialectrum/vialectrum,wakiyamap/electrum-mona,spesmilo/electrum,cryptapus/electrum,pooler/electrum-ltc,fujicoin/electrum-fjc,spesmilo/electrum,fujicoin/electrum-fjc,neocogent/electrum,cryptapus/electrum