Button click not fired if the div is moving down

Button click not fired if the div is moving down

So, the use case there is a div, one button and one textbox.
On the blur event of the textbox the div expands
and when button is clicked an alert is shown.
So both of these things work. but if my cursor is on the textbox and I try
to click on the button. Then click is not raised. I understand that, since
button has moved click is not getting raised. So, what are my options
Plunker of the code
http://plnkr.co/edit/TYXLeE?p=preview