message: Move country dropdown inside field in Settings
  This updates the Settings phone input to match the new styling used on auth
  flows.
  Fixes
diff: @@ -224,21 +224,23 @@ export default class PhoneNumbers extends React.Component {
  );
  }
  + const phoneCountry = <CountryDropdown onOptionChange={this._onCountryChanged}
  + className="mx_PhoneNumbers_country"
  + value={this.state.phoneCountry}
  + disabled={this.state.verifying}
  + isSmall={true}
  + showPrefix={true}
  + />;
  +
  return (
  <div className="mx_PhoneNumbers">
  {existingPhoneElements}
  <form onSubmit={this._onAddClick} autoComplete={false}
  noValidate={true} className="mx_PhoneNumbers_new">
  <div className="mx_PhoneNumbers_input">
  - <CountryDropdown onOptionChange={this._onCountryChanged}
  - className="mx_PhoneNumbers_country"
  - value={this.state.phoneCountry}
  - disabled={this.state.verifying}
  - isSmall={true}
  - showPrefix={true}
  - />
  <Field id="newPhoneNumber" ref="newPhoneNumber" label={_t("Phone Number")}
  - type="text" autoComplete="off" disabled={this.state.verifying} />
  + type="text" autoComplete="off" disabled={this.state.verifying}
  + prefix={phoneCountry} />
  </div>
  {addVerifySection}
  </form>
  