[wireframe] MX CheckBox and MX RadioButton render improperly after toggling the enabled property

Found in 4.5.0.17211

Steps to reproduce:
1. Copy and paste attached MXML file into a new Flex project.
2. Change your project compiler settings to use the Wireframe theme: -theme+=${flexlib}/themes/Wireframe/wireframe.swc
3. Compile and run app.
4. Note the appearance of the mx:CheckBox and mx:RadioButtons.
5. Toggle the enabled property in the app control bar so all the controls are DISabled.
6. Toggle the enabled property again so all the controls are ENabled.

Actual Results:
After #6 the mx:CheckBox and mx:RadioButton controls LOOK disabled but are enabled and interactive.

Expected Results:
The mx:CheckBox and mx:RadioButtons should look enabled after #6.

Workaround (if any):
Use Spark.