message: adjust empty left/right paddings
diff: padding: 0 8px;
  }
  +.ModalPageHeader--android .ModalPageHeader__left:empty {
  + padding-right: 14px;
  +}
  +
  .ModalPageHeader--android.ModalPageHeader--sizeX-regular .ModalPageHeader__left:not(:empty) {
  padding-left: 0;
  }
  +.ModalPageHeader--android .ModalPageHeader__right:empty {
  + padding-left: 14px;
  +}
  +
  .ModalPageHeader--android.ModalPageHeader--sizeX-regular .ModalPageHeader__right:not(:empty) {
  padding-right: 0;
  }
  