edit.html: add WIP timetable/subject HTML
edit.html: so many modals...
edit-timetable.js: WIP
edit-timetable.js: wew
edit*: needs more study
edit-timetable.js: needs less typos
edit-timetable.js: my brain might be turned off...
edit*: how to close div and show modal
edit*: needs more {selected,Bootstrap,JavaScript}
countdown.js: "classes is null"
edit-timetable.js: needs more numbers