message: Show "Something went wrong!" when errcode undefined
diff: @@ -108,6 +108,7 @@ export default React.createClass({
  const newState = {
  usernameCheckSupport: err.errcode !== "M_UNRECOGNIZED",
  };
  + console.error('Error whilst checking username availability: ', err);
  switch (err.errcode) {
  case "M_USER_IN_USE":
  newState.usernameError = 'Username not available';
  @@ -120,8 +121,11 @@ export default React.createClass({
  // fine and rely on the error appearing in registration step.
  newState.usernameError = '';
  break;
  + case undefined:
  + newState.usernameError = 'Something went wrong!';
  + break;
  default:
  - newState.usernameError = 'An error occurred' + err.message;
  + newState.usernameError = 'An error occurred: ' + err.message;
  break;
  }
  this.setState(newState);
  