title: Treeselect vue.js - don't show item selected on input box
body: <p>is it possible to not show the selected items here?</p>
  <p><a href="https://i.stack.imgur.com/PnOnd.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PnOnd.png" alt="enter image description here" /></a></p>
  <p>Instead, I just want to show the placeholder which in this case it's &quot;Select your favourite(s)...
  So the final input would look like this:</p>
  <p><a href="https://i.stack.imgur.com/liuyQ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/liuyQ.png" alt="enter image description here" /></a></p>