Stats page improvements

[BennyOptions]

Balanced has made a number of improvements since the stats UI has been developed. We should add the following:

• Display POL in the Holdings Section
• Add BALN earned somewhere (but after the expenses are paid, since it's not part of the fee handler pool)
• Add fees earned from locking BALN to Income section (but after the expenses are paid, since it's not part of the fee handler pool)