message: Add option to change the default country code
  Fixes
diff: @@ -20,6 +20,7 @@ import PropTypes from 'prop-types';
  import sdk from '../../../index';
  import { COUNTRIES } from '../../../phonenumber';
  +import SdkConfig from "../../../SdkConfig";
  const COUNTRIES_BY_ISO2 = {};
  for (const c of COUNTRIES) {
  @@ -45,17 +46,25 @@ export default class CountryDropdown extends React.Component {
  this._onOptionChange = this._onOptionChange.bind(this);
  this._getShortOption = this._getShortOption.bind(this);
  + let defaultCountry = COUNTRIES[0];
  + if (SdkConfig.get()["defaultCountryCode"]) {
  + const country = COUNTRIES.find(c => c.iso2 === SdkConfig.get()["defaultCountryCode"]);
  + if (country) defaultCountry = country;
  + }
  + console.log(defaultCountry);
  + console.log(props);
  this.state = {
  searchQuery: '',
  + defaultCountry,
  };
  }
  componentWillMount() {
  if (!this.props.value) {
  - // If no value is given, we start with the first
  + // If no value is given, we start with the default
  // country selected, but our parent component
  // doesn't know this, therefore we do this.
  - this.props.onOptionChange(COUNTRIES[0]);
  + this.props.onOptionChange(this.state.defaultCountry);
  }
  }
  @@ -119,7 +128,7 @@ export default class CountryDropdown extends React.Component {
  // default value here too, otherwise we need to handle null / undefined
  // values between mounting and the initial value propgating
  - const value = this.props.value || COUNTRIES[0].iso2;
  + const value = this.props.value || this.state.defaultCountry.iso2;
  return <Dropdown className={this.props.className + " mx_CountryDropdown"}
  onOptionChange={this._onOptionChange} onSearchChange={this._onSearchChange}
  