Trigger actions for TextField & TextArea on keyUp and keyDown.

* Trigger `key-up` and `key-down` actions.
* Remove extraneous event listeners.

As mentioned in the W3C [DOM Level 3 Events Specification](http://www.w3.org/TR/DOM-Level-3-Events/#event-type-keypress), `keypress` is being deprecated (and does not work properly on android)..

> The keypress event type is defined in this specification for reference and completeness, but this specification deprecates the use of this event type. When in editing contexts, authors can subscribe to the beforeinput event instead.