message: SimpleCell: move flex-grow to removable only
diff: */
  .Cell .SimpleCell {
  max-width: 100%;
  - flex-grow: 1;
  min-width: 0;
  }
  .Cell--removable .SimpleCell {
  + flex-grow: 1;
  padding-right: 0;
  padding-left: 0;
  }
  