Follow transaction after sending it

After submitting a transaction, the transaction isn't immediately confirmed, there are several steps, described here in TransactionStatus. And after the confirmed step above, we still wait for 6 confirmations (cf bottom right corner of this screenshot https://user-images.githubusercontent.com/11201122/39359080-2c0f8896-4a21-11e8-9f8b-2af11cc7fa6a.png)

This process can take 1-2 minutes. During all this time I believe the user should be able to keep an eye the status of his transaction, while doing other stuff on the UI.

Note: there can be multiple transactions at the same time, but that's P2 priority.