I am trying to add ui.bootstrap.alert based on this example: https://plnkr.co/edit/?p=preview .
It works fine, except that it is too big for me. 
So I changed the height in CSS and here is the new output
.alert { margin-bottom: 1px; height: 30px; }
But now the message is no longer in the middle of the alert.
How to change the height of the notification? Thanks!
Hanks source share