updated the way key and other PDOM drags are distinguished from others based on input from JO, see https://github.com/phetsims/geometric-optics/issues/259
updated the way key and other PDOM drags are distinguished from others based on input from JO, see https://github.com/phetsims/geometric-optics/issues/259

phetsims/sun,phetsims/sun,phetsims/sun