message: refactor(protocol-designer): change selected path icon border
  closes
diff: width: 2.275rem;
  height: 1.55rem;
  margin-right: 0.25rem;
  - border-radius: 2px;
  - border: 1px solid var(--c-med-gray);
  cursor: pointer;
  + border-radius: 2px;
  + border: 1px solid #c4c4c4;
  }
  .path_option.selected {
  background-color: var(--c-light-gray);
  + border-radius: 2px;
  + border: 1.5px solid var(--c-black);
  }
  .path_option.disabled {
  