QForm shake on validation error

[lugrinder]

Add shake boolean property to add shake animation to the first component that has validation error in the form. This will be similar to the focus on error, but with a more visible action like a shake. Now input components make shake on label and errors during input validation, but not in form validation (nor field value) when you submit.
In big forms with multiple inputs, this will help to identify the validation problem, is nicer...