title: MetisMenue does not collapse well on mobile view SB Admin 2
body: <p>I use the "SB Admin 2" Theme for a project.</p>
  
  <p>The integratet Metis Menu works very well on desktop, also on tablet.
  But when I visit the page with my phone, the menu doesn't hide completely.
  Only when I scroll the page.</p>
  
  <p>You can visit <a href="https://blackrockdigital.github.io/startbootstrap-sb-admin-2/pages/index.html" rel="nofollow noreferrer">https://blackrockdigital.github.io/startbootstrap-sb-admin-2/pages/index.html</a> to test ist.</p>
  
  <p>If you shrink the browser as far as its like a mobile screen, the menu does not hide.</p>
  
  <p>I tried to do it on the bottom of my index.html file with <code>$('#side-menu').metisMenu('collapse');</code> but it does not work. This is also defined in the sb-admin-2.js file. But it doenst work either. </p>
  
  <p>Can you help me to get the menu hide completly, even on mobile devices?</p>