Deactivated courses in schoolclasses are still active

[Th3Ph4nt0m]

General Troubleshooting

• I have checked for similar issues.
• I have updated to the latest version.
• I have checked the branches or the maintainers' PRs for upcoming fixes.

Describe the bug

If a user disables a course of a school class, it remains active (visible in timetable and timeline).

Environment:

• Device model: Oneplus 7 Pro
• OS version: Android 11
• App version: 11.5 (627)

[flowhorn]

Well, I checked this issue and it's actually working as expected.
A user can have a direct connection to a course, e.g. by creating or joining the course.
Meanwhile he can also be member of the course by beining member of a school class. This indirect connection can be deactivated in the school class options. But if the user is both: member of the course and the school class, this indirect deactivation is not working, as he still has a direct connection.