Popovers still inherits 0 font-size

Created by: mcantrell

There was a fix made in 2.2.2 to address 0 font size for popovers within a btn group:

https://github.com/twitter/bootstrap/issues/5939

I don't think the fix was comprehensive as it still happens in other situations. Here's an example within an input-append form element:

http://jsfiddle.net/YUS87/