title: Change navbar height in Bootstrap3
body: <p>I'm trying to reduce the height of <code>Bootstrap3</code>'s fixed navbar. I found the <code>@navbar-height</code> variable in variable. less, and changed it, but it doesn't seem to change anything.
  I also tries these solutions: "<a href="https://stackoverflow.com/questions/16612314/change-navbar-height">Change navbar height</a>", "<a href="https://stackoverflow.com/questions/11146773/navbar-height-changing">Navbar height changing</a>". No result.</p>
  
  <p>Any idea?</p>
  
  <p>Thanks</p>