title: Make Bootstrap mobile menu fullscreen
body: <p>Is there a relatively simple method for making the Bootstrap (v3) mobile menu to appear full height on screen (100%)?</p>
  
  <p>It appears as though the menu will only overlay as much as the menu content that is within it (default behaviour in bootstrap.js). I just want to prevent users from scrolling/seeing the underlying page when they are viewing the mobile menu.</p>