don't access window.event, plus lint rule, https://github.com/phetsims/scenery/issues/1053 https://github.com/phetsims/ratio-and-proportion/issues/353
don't access window.event, plus lint rule, https://github.com/phetsims/scenery/issues/1053 https://github.com/phetsims/ratio-and-proportion/issues/353

phetsims/sun,phetsims/sun,phetsims/sun