title: PrimeNG Dropdown value as string rather than object
body: <p>In <a href="https://www.primefaces.org/primeng/#/dropdown" rel="nofollow noreferrer">PrimeNG dropdown</a> is there any work around option to add 'optionValue'. </p>
  
  <p>There is currently an <code>optionLabel</code> property but no way to choose a property to represent value so you end up with the whole object. Basically in PrimeNG dropdown, trying to pass string rather than entire object</p>