Make calendar full-height (instead of fixed px-height)

changed milestone to /AlekSIS%"[NLnet #1 (closed)] Fix existing bugs with new timetable"

added part::frontend type::bug labels

assigned to @ZugBahnHof

added 1 deleted label

assigned to @lukasw and unassigned @ZugBahnHof

created branch 999-make-calendar-full-height-instead-of-fixed-px-height to address this issue

mentioned in merge request !1537 (merged)

closed with merge request !1537 (merged)

mentioned in commit b7299f6a