transferKeepAlive for all payments; transferAll to defaultWallet when deleting wallet with non null balance

Optimize payments: Use direct mnemonic or cesium seed instead of dewif unlocking; Add screen to choose a wallet other than default wallet for payment; Can restore chest from settings

use Durt 0.1.5; Split files between models and proviers; Use new appVersion getter for all plateform

Fix: State refresh when changing default wallet; State refresh whern deleting all wallets; Tests are OK