TIC 4391, closes #4391

RELEASE-NOTES.md

app/controllers/admin/tree.php

app/controllers/admin/user.php

app/controllers/admission/restricted_courses.php

app/controllers/contents/courseware.php

app/controllers/course/dates.php

app/controllers/course/details.php

app/controllers/lti.php

app/controllers/my_courses.php

app/controllers/news.php

app/views/admission/courseset/configure.php

app/views/admission/restricted_courses/index.php

app/views/course/wizard/steps/basicdata/index.php

app/views/course/wizard/steps/basicdata/index_studygroup.php

app/views/lvgruppen/lvgruppen/details.php

db/migrations/6.0.18_remove_course_mapping_by_timestamps.php

lib/classes/AutoInsert.php

lib/classes/CoursesetModel.php

lib/classes/JsonApi/Routes/Courses/CoursesByUserIndex.php

lib/classes/JsonApi/Routes/Schedule/UserScheduleShow.php