Add date to timetable overview page route (like on calendar page)

changed milestone to /AlekSIS%"[NLnet #1 (closed)] Implement timetable notifications"

added part::frontend type::feature labels

assigned to @yuha

created branch 253-add-date-to-timetable-overview-page-route-like-on-calendar-page to address this issue

mentioned in merge request !368 (merged)

closed with merge request !368 (merged)

mentioned in commit 730ff304