title: Ionic 2 select: remove selected option
body: <p>I'm using ion-select component in a form, but got a problem: if users selects one option, but then wanna remove it, it doesn't give the option. I could add a <code>&lt;ion-option&gt;</code> with blank value, but think it wouldn't be nice. Is there a better way to solve that?</p>
  
  <p>EDIT: 
  This is how my select options looks right now:
  <a href="https://i.stack.imgur.com/cEgd6.png" rel="noreferrer"><img src="https://i.stack.imgur.com/cEgd6.png" alt="enter image description here"></a></p>
  
  <p>If the users selects one option and then changes his mind and don't wanna select any option, it doesn't seems pretty clear the way he can do that. Even if add a "Remove Option" with blank value, it still looks like an option, doesn't seems nice to me. With a traditional select, the blank option without a text seems pretty intuitive. But in this case, I was thinking in something like a " (X) Remove selected", near to "Cancelar/Confirmar" options in the footer, or something like that. Any ideas? 
  Ps: also, ion-option seems to strip any html tag I put on my option, so it keeps pretty tough to format my "select none" option</p>