message: trimming space for username.
diff: @@ -117,12 +117,14 @@ export const SendBitcoinScreen: React.FC = observer(({ route }) => {
  const [amountless, setAmountless] = useState(false)
  const [initAmount, setInitAmount] = useState(0)
  const [amount, setAmount] = useState(0)
  - const [destination, setDestination] = useState("")
  + const [destination, setDestinationInternal] = useState("")
  const [invoice, setInvoice] = useState("")
  const [memo, setMemo] = useState("")
  const [initialMemo, setInitialMemo] = useState("")
  + const setDestination = input => setDestinationInternal(input.trim())
  +
  // if null ==> we don't know (blank fee field)
  // if undefined ==> loading
  // if -1, there is an error
  