Adds StellarNetwork.ensureConnected
Rework balances.get, extracting methods and simplifying conditionals
Asyncify Balances.get
Merge pull request #872 from stellar/ensure-connected

Introduce StellarNetwork.ensureConnected && asyncify Balance.get
Added another instance of smart detecting tradingOperation text output
Added a pair-not-selected state on the trading balances widget
Merge pull request #881 from stellar/tradeOperation-amend-pr-870

Added another instance of smart detecting tradingOperation text output
Use better way of handling different states inside widget
Merge pull request #884 from stellar/corresponding-balances-loading-state-883

Added a pair-not-selected state on the trading balances widget
Show gateway url (and not federation) in trading widget
Trading balance link gateway indentation
Merge pull request #890 from stellar/trading-balances-federation-885

Show gateway url (and not federation) in trading widget
Set issuer explicitly when changing currencies
Show loading while waiting for order book data
Merge pull request #873 from stellar/order-book-loading

Order book loading
Calculate unit price when counter amount changes
Catch bad input, don't calculate unless valid