message: Fix incorrect error display for offer amount
diff: @@ -309,8 +309,6 @@ export default class AddOffer extends Component<any, any> {
  }
  handleExchangeRateChange = (value) => {
  - let { buyAmount, sellAmount } = this.state
  -
  if (!isNumberStringFormatCorrect(value)) {
  return undefined
  }
  @@ -479,8 +477,6 @@ export default class AddOffer extends Component<any, any> {
  const {
  sellCurrency,
  buyCurrency,
  - sellAmount,
  - buyAmount,
  balanceForSellTokenFee,
  balanceForBuyTokenFee,
  buyBlockchain,
  @@ -490,12 +486,12 @@ export default class AddOffer extends Component<any, any> {
  this.setState(() => ({
  sellCurrency: buyCurrency,
  sellBlockchain: buyBlockchain,
  - sellAmount: buyAmount,
  + sellAmount: '',
  balanceForSellTokenFee: balanceForBuyTokenFee,
  // ----
  buyCurrency: sellCurrency,
  buyBlockchain: sellBlockchain,
  - buyAmount: sellAmount,
  + buyAmount: '',
  balanceForBuyTokenFee: balanceForSellTokenFee,
  }), async () => {
  await this.checkBalance(buyCurrency)
  @@ -573,7 +569,7 @@ export default class AddOffer extends Component<any, any> {
  </span>
  )
  }
  - if (linked.buyAmount.value !== '' && linked.sellAmount.value > 0) {
  + if (linked.buyAmount.value !== '' && linked.buyAmount.value > 0) {
  linked.buyAmount.check((value) => (new BigNumber(value).isGreaterThan(minimalAmountBuy)),
  <span>
  <FormattedMessage id="transaction450" defaultMessage="Buy amount must be greater than " />
  