Support small <area>s with link hints
Support small <area>s with link hints

This is primarily to deal with our calculated rects being too small for
the `<area shape="poly">` on
http://www.mapsofindia.com/worldmap/clickable-world-map.html

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