[web] Make the time separator configurable in JQueryDateTimePicker We add a "separator" argument to JQueryDateTimePicker which will be used when creating the underlying JQueryTimePicker instance so that the user can control how time is displayed by the widget. This is very similar to the "timesteps" argument that's already present.

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