message: disable mainnet for the first public release
diff: @@ -254,7 +254,8 @@ export const Settings: React.FC<Props> = (props): JSX.Element => {
  <Styled.Placeholder>{intl.formatMessage({ id: 'setting.version' })}</Styled.Placeholder>
  <Styled.ClientLabel>v{apiVersion}</Styled.ClientLabel>
  <Styled.Placeholder>{intl.formatMessage({ id: 'common.network' })}</Styled.Placeholder>
  - <Dropdown overlay={networkMenu} trigger={['click']}>
  + {/* Disable dropbox for the first public release */}
  + <Dropdown overlay={networkMenu} trigger={['click']} disabled>
  <Row align="middle" style={{ display: 'inline-flex' }} onClick={(e) => e.preventDefault()}>
  <Styled.NetworkTitle>{selectedNetwork}</Styled.NetworkTitle>
  <DownIcon />
  