fixed invalid 'pfi' bug, cleaned up handleKey
fixed invalid 'pfi' bug, cleaned up handleKey

samthor/dialog-polyfill,lozandier/dialog-polyfill,kublaj/dialog-polyfill,elektronik2k5/dialog-polyfill,lozandier/dialog-polyfill,neilrees/dialog-polyfill,kublaj/dialog-polyfill,huangxok/dialog-polyfill,samthor/dialog-polyfill,GoogleChrome/dialog-polyfill,neilrees/dialog-polyfill,huangxok/dialog-polyfill,elektronik2k5/dialog-polyfill,GoogleChrome/dialog-polyfill