Combo-box single select bottom border radius

[ParaleGleniel]

After selecting an option in the select, the bottom border radius is not rounded until you click away from the component.

[nallwhy]

Add this to combo-box.css.

/* Fix broken border */
.ts-dropdown .option:last-child {
  @apply rounded-lg;
}

[nallwhy]

I hope it would be merged.