add support for identity approval flow for buy with ETH and buy with BTC, convert promises to observables in buy deso eth component#88

lazynina wants to merge 2 commits intomaindiamond-app/frontend:mainfrom

ln/approve-window-for-btc-and-ethdiamond-app/frontend:ln/approve-window-for-btc-and-ethCopy head branch name to clipboard