Show remaining confirmation on the redeem tab when a user is entering a TxID

[MaudSimon]

Currently, if you're trying to redeem a transaction on the redeem page before the number of confirmation/ sufficient time has been reached, you get an error message. Most of the "support" request comes from users thinking the transaction hasn't gone true because of that.

It would be great to display the current number of confirmation/time and what is remaining similarly to how it's displayed on the transfer page. It would reassure the user and reduce the number of support request we receive.

This may be dependent to #112 as on the transfer page you can only see the progress bar with your wallet connected but maybe it's not even needed and the progress could be deduced directly from the TxID/explorer data ?