[4.1.3] field hasFocus property

Any chance the hasFocus property of Ext.form.field.Base could be promoted to a public property in a future release?
http://docs.sencha.com/ext-js/4-1/#!...perty-hasFocus

It's a possibility, I don't really know why it's private honestly.

It's been around for a while looks like so I feel semi-confident using it, but I've used private methods before and lost them in new dot releases.

Thanks for looking into it.