[Website][Change Request] Bring more clarity per miner round statistics and immature balance

Current display of per-miner stats brings FAQ in chat, primarily regarding immature balance and round number.

Recommend breaking out stats a little further to better highlight the delineation between R-2, R-1, and R, and how they flow into Unpaid balance. (Mockup attached)

1. Add current round estimate to miner stat page (pool per share estimate * current shares)
2. Add last round estimate to miner stat page (r-1 pool per share estimate * r-1 shares)
3. Relabel "Immature" to "Confirmation"
4. Add hint text to the balance section explaining confirmation vs. estimates (icon hover)
   • Order by Unpaid, Confirmation, Last, Current, to reinforce bottom-up flow into unpaid balance.
5. Match round display of Balance, in both Shares and Active Workers
   • Roll HR box into Active Workers box
6. Remove duplicate stats (avg HR this round, avg HR last round, reward round n-2) from "Miner info" pane on right.