Make substitutions table more compact

assigned to @hansegucker

added part::frontend source::customer::kath type::bug workflow::current-todo labels

changed milestone to /AlekSIS%"[NLnet #7 (closed)] Fix bugs, improve usability, and implement additional features based on feedback reports by pilot schools in timetable management and class register"

created branch 271-make-substitutions-table-more-compact to address this issue

mentioned in merge request !389 (merged)

mentioned in commit 41d01800

closed with merge request !389 (merged)