Uncomment/add `addLinkedElement` calls into GQ common code types. Add assertions and bug fixes for LinkedElements with serialization and optional instrumentation. Fix usages where instrumented Slider/Checkbox/NumberPicker were passed uninstrumented Properties. Recompute baseline. https://github.com/phetsims/sun/issues/420
Uncomment/add `addLinkedElement` calls into GQ common code types. Add assertions and bug fixes for LinkedElements with serialization and optional instrumentation. Fix usages where instrumented Slider/Checkbox/NumberPicker were passed uninstrumented Properties. Recompute baseline. https://github.com/phetsims/sun/issues/420

phetsims/sun,phetsims/sun,phetsims/sun