Error messages in bootstrap popover

Hi ablanco, 

I was having some issue with the folding up of the UI when an error message appears. 
The progress bar detaches from the input field and jumps down when errors appear.
To have a more "fixed" UI, I added an option to display the verdict and the error messages in a bootstrap popover.

see http://getbootstrap.com/javascript/#popovers

This is a "no config" popover, which means the user doesn't need to configure the look and functionality.
But that also means the user can't customize it...
It made more sense to have that kind of generic popover (not changeable), for abstracting away time consuming configuration.

Moreover I removed error messages and the verdict when there is no input at all.
It's a matter of taste, but for me it makes more sense and looks better. What do you think?