WpfApproval workaround/enhancement

3e99069 - per StackOverflow problem ... removed hardcoded UniqueForOs in WpfApprovals.Verify to allow for tests to work across different editions..  Alternative solution would be to use a UniqueForOsVersion() that doesn't include edition info like Professional or Enterprise.

73b130b - The STA workaround for Windows was not supported for Controls.  Added method to allow using  Verify(Func<Control>) as an argument similar to the Verify(Func<Windows>)