Revert "Ensure that the Vomnibar iframe background is transparent"
Revert "Ensure that the Vomnibar iframe background is transparent"

This reverts commit 26cbeba9b9301652d15e01ad4dac9248637ba3eb.

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