⚡[FEAT] Show current block reward on mining screen

[whoabuddy]

Is your feature request related to a problem? Please describe.

When mining, it'd be nice to know what the block reward is for a given contract.

Describe the solution you'd like

This could be a simple component that accepts the current block height and contract props to perform the query, then return the current block reward. It could also show how many blocks until the next threshold.

Describe alternatives you've considered

It's outlined in the docs now, but live examples per city are better than having to calculate it manually!