title: Tabbar hide badge when Tabbaritem touched
body: <p>I trying to use tabbar badges but i have  problem ... I have found how to set the badge</p>
  
  <p>but i can't find how to catch the touch event for the tabbaritem so i can delete the badge when the user is on the corresponding tabbaritem</p>
  
  <p>Thanks for your help</p>