Simplify mode_key_handler.coffee
Simplify mode_key_handler.coffee

gdh1995/vimium,smblott-github/vimium,gdh1995/vimium,philc/vimium,smblott-github/vimium,philc/vimium,gdh1995/vimium,philc/vimium,smblott-github/vimium