message: CellButton: fixed margin between children and before
diff: }
  .CellButton--ios .CellButton__before .Icon {
  - margin-right: 12px;
  + margin-right: 16px;
  }
  /*
  }
  .CellButton--android .CellButton__before .Icon {
  - margin-right: 12px;
  + margin-right: 16px;
  }
  