[Gauge] - Improve UX around setApprovals for delegating actions

[storming0x]

veYFI/contracts/Gauge.sol

Line 537 in bff7cc2

function setApprovals(

i think it's better UX to have granular methods, instead of a single setter with boolean arguments where one argument can easily be sent in bad order and confusing for caller.

setApprovals(0x01, true, false) can have different consequences than setApprovals(0x01, false, true)

potentially error prone, i prefer explicit methods.

enableClaimingFrom(address). disableClaimingFrom(address)

enableLockingFrom(address). disableLockingFrom(address)

less arguments and makes the side effect explicit avoiding potential oops factor