Feature suggestion - Blockchain Wallet API List Addresses should include an optional field $confirmations

Reasoning:
If I am keeping track of multiple accounts looking for full confirmations I first have to make an API call to get 0 confirmation balance for every address and then make individual call for every wallet with balance >0 to check if their balance has 6 or more confirmations. Including $confirmations optional flag in List Addresses API call would cut down on the API calls from potentially many to just 1 API call.