FLEX-33505: NumericStepper not updating on 'change'

Both the MX and Spark versions of the NumericStepper didn't have properly set up 'change' event handlers. Without these the value was not committed when no external event (focus out, button click) was trigered.

Signed-off-by: Erik de Bruin <erik@ixsoftware.nl>
Merge branch 'develop' of https://git-wip-us.apache.org/repos/asf/flex-sdk into develop
FLEX-33544 Make paste to single line field ignore both \r and \n
Merge branch 'develop' of https://git-wip-us.apache.org/repos/asf/flex-sdk into develop