design: hide tfresnelform.style property in OI

design/fresnel.register.pas

@@ -90,6 +90,7 @@ begin
                                 FileDescGroupName);
 
   RegisterPropertyEditor(TypeInfo(String), TFresnelElement, 'Style', TFresnelStylePropertyEditor);
+  RegisterPropertyEditor(TypeInfo(String), TCustomFresnelForm, 'Style', THiddenPropertyEditor);
 end;
 
 { TFresnelFormMediator }