cubicweb-cmt #2335854 have a page of empty badges on the the printout of the badges [validation pending]

Have a page with empty badges so they can be filled up on "by hand" on the day.

done in0.7.0
load left0.000
closed by#c26233df678c [views] add a page to pdf with logo only so as to do handmade badges (closes #2335854)