…not projected balance

Pending transactions might not be processed in chronological order in
some financial backends. This can lead to transactions to be rejected
due to monujo showing the projected balance. This fix will check the
real balance (without the pending transactions) before sending a new
transaction.

Test are now failing regularly with timeout and make this change
required.

… confirmation message

Once the transaction is successfully sent, we are checking afterwards
if it is correctly registered on the financial backend. It this check
fails, we must explain the situation clearly to the user as the
transaction was probably correctly processed, but our failing check,
should probably raise the vigilance of the user.

…al currency

…with ```monetTransferModal```