Modes; when exiting on Escape, also grab keyup event.
Modes; when exiting on Escape, also grab keyup event.

Fixes #1416.

poacher2k/vimium,zhangmin510/vimium,justalittlenoob/vimium,mrmr1993/vimium,PickRelated/vimium,csmalin/vimium,bkudria/vimium,Robinson10240/vimium,gdh1995/vimium,tuchangwei/vimium,borgified/vimium,douglas-larocca/vimium,elderbas/vimium,elegantwww/vimium,PrestanceDesign/vimium,justalittlenoob/vimium,tuchangwei/vimium,philc/vimium,csmalin/vimium,wildeyes/vimium,Aleroniponi/vimium,dimatter/vimium,wildeyes/vimium,poacher2k/vimium,borgified/vimium,hhsue/vimium,hhsue/vimium,willsALMANJ/vimium,mrmr1993/vimium,Lw-Cui/vimium,cyrixhero/vimium,douglas-larocca/vimium,smblott-github/vimium,VPashkov/vimium,elderbas/vimium,philc/vimium,tuchangwei/vimium,Aleroniponi/vimium,willsALMANJ/vimium,decaffeinate-examples/vimium,hhsue/vimium,zhangmin510/vimium,decaffeinate-examples/vimium,VPashkov/vimium,smblott-github/vimium,douglas-larocca/vimium,Lw-Cui/vimium,PickRelated/vimium,philc/vimium,elegantwww/vimium,Robinson10240/vimium,dimatter/vimium,Robinson10240/vimium,cyrixhero/vimium,Aleroniponi/vimium,smblott-github/vimium,bkudria/vimium,mrmr1993/vimium,Lw-Cui/vimium,decaffeinate-examples/vimium,VPashkov/vimium,gdh1995/vimium,elegantwww/vimium,PrestanceDesign/vimium,zhangmin510/vimium,PrestanceDesign/vimium,justalittlenoob/vimium,dimatter/vimium,cyrixhero/vimium,bkudria/vimium,willsALMANJ/vimium,csmalin/vimium,PickRelated/vimium,gdh1995/vimium,wildeyes/vimium,borgified/vimium,poacher2k/vimium,elderbas/vimium