ui: use currency:sym mapping for currency/pair representation
ui: implemented monaco vcscode editor for strategy editor
ui: fixed bad connection modal on app start every time
ui: fixed algo params validation error stays visible after changing algo
server: fixed wrong error message on not enough balance
server: fixed cancel all orders functionality
server: fixed issue in clean data and reset functionality
server: fixed issue related to invalid api key permissions
algo: fix issue with ping pong when no order is matched
