message: fix(protocol-designer): allow adding labware to slots again
  fixes bug introduced by where you couldn't add labware to slots
diff: @@ -64,7 +64,7 @@ export const SlotControlsComponent = (props: Props) => {
  } = props
  if (
  selectedTerminalItemId !== START_TERMINAL_ITEM_ID ||
  - itemType !== DND_TYPES.LABWARE
  + (itemType !== DND_TYPES.LABWARE && itemType !== null)
  )
  return null
  