add some live data like block number

[brenzi]

Liveness can't be experienced right now with this app. The first thing I'd be looking for is increasing block number that I can match with some web block explorer

[RomeroYang]

Same reason with #10 , normal users of a wallet App doesn't need informations like that.

[brenzi]

I disagree. As a user I need to be convinced that the data I see is recent and the connection is alive. This doesn't need to be very prominently showcased, but some kind of blockchain heartbeat would be desirable