cubicweb-timesheet #1908696 url of the form /missing-activities/login/YYYYMMDD-TODAY [validation pending]

it would be nice to have a fixed url to check everything up to "today" instead of having to generate the url with today's date.

prioritynormal
typeenhancement
done in0.8.0
load0.200
load left0.000
closed by#ef9d56ae37f1 [urls] add /missing-activities/login/YYYYMMDD-TODAY (closes #1908696)