Validator should validate also on some specialized event

[pmaselkowski]

This might be useful in one (more?) scenario:

Let's name event validate-all

1. User omitted required field
2. Submits data - here validate-all event be used
3. Server side validation is performed
4. Server side generated error message is displayed
5. Non-valid fields should be highlighted - by event validate-all

This could have options, like:

event.data.showResults = {
    success: false, // Don't show success validation
    error: true // Show error validation
};

Solution with showResults could be used to emphasize invalidated inputs, rather than all.

Cons: This could lead to massive validation calls on complex forms.
Maybe also could limit to some particular model or by callback etc.