create PhetioCapsule, reinstrument AboutDialog as encapsulated with PhetioCapsule, add `isDynamicElementPrototype` to PhetioObject, used by all dynamic element containers, https://github.com/phetsims/phet-io/issues/1559
create PhetioCapsule, reinstrument AboutDialog as encapsulated with PhetioCapsule, add `isDynamicElementPrototype` to PhetioObject, used by all dynamic element containers, https://github.com/phetsims/phet-io/issues/1559

phetsims/sun,phetsims/sun,phetsims/sun