title: Ionic 4, Tabs menu with center button hump
body: <p>I was just wondering that how can we create a button in center of tab menu like:
  <a href="https://i.stack.imgur.com/fUHk5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fUHk5.png" alt="enter image description here"></a> </p>
  
  <p>Tried few tests but couldn't get same or similar to this. Is there any help to do this?</p>