add linkedElement zoomProperty, move PM zoomProperty to viewProperties, https://github.com/phetsims/projectile-motion/issues/245
add linkedElement zoomProperty, move PM zoomProperty to viewProperties, https://github.com/phetsims/projectile-motion/issues/245

phetsims/scenery-phet,phetsims/scenery-phet,phetsims/scenery-phet