title: How to close a mat dialog without a backdrop on clicking outside?
body: <p>How Can I close the dialog in this <strong><a href="https://stackblitz.com/edit/angular-tkg6v6" rel="noreferrer">stackblitz example</a></strong> <strong>(Minimal, Reproducible Example.)</strong> by clicking outside ?</p>
  
  <p>This works fine if I remove the property <code>hasBackdrop: false</code> -> <a href="https://stackblitz.com/edit/angular-tkg6v6-2wxntt?file=app%2Fdialog-overview-example.ts" rel="noreferrer">Working Stackblitz Example</a></p>