Add views to access filtered timetables.

Add sensible ways to get to class, room and teachertimetables.

added part::backend part::frontend prio::1 type::feature labels

assigned to @dummerdelfin

changed milestone to %1.0a0

The timetable view already accepts GET parameters group, person and room, which take the ID of the respective object type.

What is missing is three dropdown fields on top of the tiemtable week view that get the user to the filtered view.

assigned to @nik and unassigned @dummerdelfin

mentioned in commit 7f47f710

assigned to @dummerdelfin and unassigned @nik

/cc @dummerdelfin

The filter selection form only needs some styling now.

It is rendered as a <ul>, but we probably want it on a single line or something.

closed via commit 090fab85

reopened

Now the filter fields are correctly populated, fix was necessary in get_current_school in core.

mentioned in merge request !7 (merged)

mentioned in commit fcdb38fe

closed via merge request !7 (merged)

closed via commit fcdb38fe

closed via commit d83f65b5

mentioned in commit d83f65b5

mentioned in commit 090fab85

mentioned in commit 090fab85