Fix for: BHV-9375

Changes to the `style` and `classes` properties of _enyo.Control_ were not properly setting their `tagsValid` internal flag. This particular state is handled by the `enyo.HTMLStringDelegate` by default but it wasn't getting the opportunity if the _control_ had a `node` already. Now it can properly handle the changes as it needs and other _render delegates_ will have the opportunity as well.

Enyo-DCO-1.1-Signed-Off-By: Cole Davis (cole.davis@lge.com)