Optionally for Tutorials for TAs

[colinhia]

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

Was thinking of adding the slot I am TAing into my timetable, but couldnt find a way to without adding the corresponding lecture slots as well.
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Describe the solution you'd like

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Maybe an option for TA for each mod, or a catch-all placeholder mod that can be used to represent all tutorial timings

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[jloh02]

This appears to be a subset of #2040?