message: ModalCardBase: fixed Button margins
diff: * ModalCardBase
  */
  +.ModalCardBase__actions .Button {
  + flex: 1;
  + margin-left: 6px;
  + margin-right: 6px;
  +}
  +
  .ModalCardBase__actions--v .Button {
  margin-left: 0;
  margin-right: 0;
  .ModalCardBase__actions--v .Button + .Button {
  margin-top: 12px;
  }
  -
  -.ModalCardBase__actions .Button {
  - flex: 1;
  - margin-left: 6px;
  - margin-right: 6px;
  -}
  