title: How to add hamburger button in angular material sidenav
body: <p>I already found this template in plunker but the sidenav disappears when the screen is 600 px or less, how do I add hamburger button to show and hide the sidenav menu?</p>
  
  <p><a href="http://embed.plnkr.co/d3zExiS03YNOMLHdfEIj/preview" rel="nofollow">http://embed.plnkr.co/d3zExiS03YNOMLHdfEIj/preview</a></p>