Help dialog; set maximum width.
Help dialog; set maximum width.

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