Fix moveTab for pinned tabs.
Fix moveTab for pinned tabs.

Fixes #1814.

(This fixes a problem that was introduced in the "fix" of #1727.)

Lw-Cui/vimium,VPashkov/vimium,elegantwww/vimium,csmalin/vimium,zhangmin510/vimium,dimatter/vimium,Lw-Cui/vimium,borgified/vimium,mrmr1993/vimium,gdh1995/vimium,philc/vimium,decaffeinate-examples/vimium,philc/vimium,dimatter/vimium,borgified/vimium,philc/vimium,hhsue/vimium,smblott-github/vimium,gdh1995/vimium,poacher2k/vimium,mrmr1993/vimium,decaffeinate-examples/vimium,Lw-Cui/vimium,willsALMANJ/vimium,VPashkov/vimium,zhangmin510/vimium,borgified/vimium,smblott-github/vimium,csmalin/vimium,Aleroniponi/vimium,poacher2k/vimium,willsALMANJ/vimium,Aleroniponi/vimium,elegantwww/vimium,decaffeinate-examples/vimium,gdh1995/vimium,Aleroniponi/vimium,hhsue/vimium,hhsue/vimium,smblott-github/vimium,csmalin/vimium,willsALMANJ/vimium,mrmr1993/vimium,elegantwww/vimium,dimatter/vimium,zhangmin510/vimium,VPashkov/vimium,poacher2k/vimium