APY is calculated from amount in contract, not amount remaining to be claimed

[anisoptera]

Looking at the HNY-WXDAI pool right now, I see that the pool claims to have 58.6 HNY remaining in it and a 160% APY:

However, farming has ended on this pool, so that 58.6 HNY is just unclaimed rewards and the pool has a 0% APY:

We should make sure that the APY and HNY listed here are based on the amount remaining to be awarded, not the amount that's in the contract.