message: fix(protocol-designer): Lighten TC hover overlay
  closes
diff: display: flex;
  align-items: center;
  justify-content: center;
  - background-color: color-mod(var(--c-highlight) alpha(0.5));
  + background-color: color-mod(var(--c-highlight) alpha(0.25));
  }
  .thermocycler_icon {
  