Fix handler return for escape.
Fix handler return for escape.

We've consumed the event here, so we should suppress it.

willsALMANJ/vimium,mrmr1993/vimium,poacher2k/vimium,gdh1995/vimium,gdh1995/vimium,smblott-github/vimium,willsALMANJ/vimium,mrmr1993/vimium,smblott-github/vimium,decaffeinate-examples/vimium,willsALMANJ/vimium,decaffeinate-examples/vimium,decaffeinate-examples/vimium,poacher2k/vimium,philc/vimium,smblott-github/vimium,philc/vimium,gdh1995/vimium,mrmr1993/vimium,poacher2k/vimium,philc/vimium