Fix <C-6> when it refers to a hidden tab.
Fix <C-6> when it refers to a hidden tab.

Kjwon15/dactyl,nathyong/dactyl,airodactyl/dactyl,madand/pentadactyl-pm,nathyong/dactyl,invl/dactyl,5digits/dactyl,5digits/dactyl,moonshadow/dactyl,airodactyl/dactyl,invl/dactyl,invl/dactyl,5digits/dactyl,moonshadow/dactyl,airodactyl/dactyl,moonshadow/dactyl,madand/pentadactyl-pm,Kjwon15/dactyl,madand/pentadactyl-pm,Kjwon15/dactyl,invl/dactyl,invl/dactyl,invl/dactyl,airodactyl/dactyl,moonshadow/dactyl,moonshadow/dactyl,nathyong/dactyl,madand/pentadactyl-pm,airodactyl/dactyl,Kjwon15/dactyl,nathyong/dactyl,moonshadow/dactyl,airodactyl/dactyl,madand/pentadactyl-pm,nathyong/dactyl,5digits/dactyl,nathyong/dactyl,5digits/dactyl,5digits/dactyl,Kjwon15/dactyl,Kjwon15/dactyl,madand/pentadactyl-pm