Fix #3.

It's a chromium blink problem..
See. http://www.sencha.com/forum/showthread.php?269123-2.2.1-default-app.css-amp-chromium-blink-problem&p=987612&viewfull=1#post987612
Fix #3.

It's a chromium blink problem..
See. http://www.sencha.com/forum/showthread.php?269123-2.2.1-default-app.css-amp-chromium-blink-problem&p=987612&viewfull=1#post987612