Consume keyboard events for marks.
Consume keyboard events for marks.

We were leaking both the `keypress` and the `keyup` events when marks
are created and used.

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