message: Clear out discovery errors on each try
diff: @@ -265,7 +265,10 @@ module.exports = React.createClass({
  },
  onUsernameBlur: function(username) {
  - this.setState({ username: username });
  + this.setState({
  + username: username,
  + discoveryError: null,
  + });
  if (username[0] === "@") {
  const serverName = username.split(':').slice(1).join(':');
  try {
  