use watcher's /deposits.all endpoint to fetch past deposits #91
Description
web-wallet should use watcher's endpoint to fetch all the confirmed deposits instead of calling Ethereum node.
As for the unconfirmed deposits (deposits not yet seen by Watcher passed the configured block confirmations), the web-wallet could look only for pending statuses from Ethereum node.
ie. wallet call Eth node for deposits between
web3.eth.isSyncing().currentBlockHeight - services_synced_heights.depositor as opposed to searching from the genesis block/block 0