Fixed: CPRadioGroup were truncated

Since PR #2170, CPRadioGroup were truncated because they are specific components translated into a NSMatrix (CPView) object.
This fix sets CPRadio controlSize according to xCode value and uses its frame adjustment to adjust CPRadio inside a CPRadioGroup.
Test: Update CPControlSize and Nib2CibAlignment tests to show CPRadioGroup truncated fix.

It removes unuseful grid image and adds CPRadio and CPRadioGroup into CPControlSize and Nib2CibAlignment tests.
Merge pull request #2191 from t00f/fix#2182

Fixed truncated CPRadio / CPRadioGroup. #2182