Pass changed attrs to "validated:*" events

[jeron-diovis]

If we don't attach validation mixin through view and mixing it directly to model,
we don't have access to valid/invalid callbacks. So we can use only "validated:*" events.
And so - we never know which exactly attributes was validated, which is very important information.

Need to pass list of changed attributes to validation events.

[platinumazure]

Not seeing any unit tests here.

[jeron-diovis]

Is it ok?

[platinumazure]

@jeron-diovis Actually: Just wondering, have you tried using model.changedAttributes()? Perhaps that will do what you want?