Add delay to sound toggle button alert so user isn't spammed with announcements, see phetsims/resistance-in-a-wire#193 and phetsims/sun#424
Add delay to sound toggle button alert so user isn't spammed with announcements, see phetsims/resistance-in-a-wire#193 and phetsims/sun#424

phetsims/joist,phetsims/joist,phetsims/joist