Add some feedback messages for find service.
Add some feedback messages for find service.

Also, do not assume that findModeRawQuery has a value.

hhsue/vimium,cyrixhero/vimium,shaung/vimium,smblott-github/vimium-smblott,dimatter/vimium,dimatter/vimium,Robinson10240/vimium,justalittlenoob/vimium,willsALMANJ/vimium,csmalin/vimium,willsALMANJ/vimium,crazypenguincode/vimium,elegantwww/vimium,hhsue/vimium,PrestanceDesign/vimium,willsALMANJ/vimium,jb55/vimium-plus,wildeyes/vimium,elegantwww/vimium,borgified/vimium,tuchangwei/vimium,zhangmin510/vimium,justalittlenoob/vimium,elegantwww/vimium,Aleroniponi/vimium,zhangmin510/vimium,cyrixhero/vimium,hhsue/vimium,VPashkov/vimium,Lw-Cui/vimium,tuchangwei/vimium,elderbas/vimium,douglas-larocca/vimium,elderbas/vimium,bkudria/vimium,Lw-Cui/vimium,gdh1995/vimium,Robinson10240/vimium,PickRelated/vimium,llimllib/vimium,PrestanceDesign/vimium,VPashkov/vimium,csmalin/vimium,decaffeinate-examples/vimium,philc/vimium,mrmr1993/vimium,smblott-github/vimium,douglas-larocca/vimium,tuchangwei/vimium,smblott-github/vimium,poacher2k/vimium,borgified/vimium,Aleroniponi/vimium,PrestanceDesign/vimium,crazypenguincode/vimium,decaffeinate-examples/vimium,philc/vimium,poacher2k/vimium,wildeyes/vimium,bkudria/vimium,elderbas/vimium,PickRelated/vimium,justalittlenoob/vimium,mrmr1993/vimium,VPashkov/vimium,gdh1995/vimium,dimatter/vimium,smblott-github/vimium-smblott,csmalin/vimium,smblott-github/vimium,Robinson10240/vimium,douglas-larocca/vimium,cyrixhero/vimium,wildeyes/vimium,PickRelated/vimium,borgified/vimium,jb55/vimium-plus,mrmr1993/vimium,Lw-Cui/vimium,philc/vimium,Aleroniponi/vimium,zhangmin510/vimium,bkudria/vimium,decaffeinate-examples/vimium,poacher2k/vimium,gdh1995/vimium