Show Fee Claim Threshold field

[hav-noms]

Saying 1%(10%) throws users off because we display the inverse of the c-ratio setting which is .1333 so 100/.1333 = 750 and the 1% threshold is 1/.1333 = making it 7.5 off 750 = 742.5. Where as it was previously 10% 10/.1333 = 75 so you could be as low as 10/.1333-750=674 before you were blocked from claiming fees which was far too low. The 1% (or 7.5%) depending which way you look at is there to protect you from immediate price fluctuations after burning to claim fees.
Ideally the DApp should be showing a field for the Fee Claim Threshold calculating it from on chain 100/SynthetixState.issuanceRatio-FeePool.targetThreshold/SynthetixState.issuanceRatio = 100/.1333-1/.1333=742.5%. If we change the c-ratio back to 500% it would be 100/.2-1/.2=495 for the Fee Claim Threshold