[web] remove next_tabindex() It's hard to see it work reliably in view of multiple server processes. If something like that is needed it should probably be built on the client (js) side.

etc/init.d
etc/cubicweb.d
etc/bash_completion.d
usr/bin
usr/share/doc/cubicweb-ctl
var/log/cubicweb
var/lib/cubicweb/backup
var/lib/cubicweb/instances