Fixes #5831.  Added getValue/setValue to CheckBox.  Fixed Form.html unit test.
Fixes #5831.  Added getValue/setValue to CheckBox.  Fixed Form.html unit test.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@12387 560b804f-0ae3-0310-86f3-f6aa0a117693

Sam-Cummins/delite,Sam-Cummins/delite,harbalk/delite,kitsonk/delite,kitsonk/delite,harbalk/delite