Enable Audit mode for courses

[Omgeta]

Is your feature request related to a problem? Please describe.

Enable Audit for timetabled courses which shows only lectures and no tutorials.

Describe the solution you'd like

Mirror of current Enable TA, but allowing users to enable/disable lecture slots instead of tutorial/lab slots. Default/TA/Audit would be mutually exclusive, possibly through a dropdown menu.

Describe alternatives you've considered

Right now, the only option is to just use the default mode for courses but pretend that the tutorial/lab slots don't exist

Additional context

[leslieyip02]

Hi, sorry for the really late reply.

I think one more possibility is to implement custom modules, which are more flexible and would also cover this use case. There have been a few attempts to implement custom modules (i.e. #3373), but I think we can only proceed after merging #4225 since it changes timetable representation quite a bit.