message: Updated: add a label for clicking.
diff: flex-grow: 1;
  }
  +.Application__menuItemLabel {
  + @apply --layout-center-center;
  +}
  +
  +.Application__menuItemInput {
  + display: none;
  +}
  +
  .Application__mainColumn {
  flex-grow: 1;
  padding: 24px;
  