Resolve "Fields in course planning should be as small as possible"

Closes #13

changed milestone to /AlekSIS%"[NLnet #1 (closed)] Fix existing bugs with new timetable"

added part::frontend source::customer::kath labels

assigned to @yuha

added 40 commits

• 8b2979c1...db2cabf0 - 19 commits from branch master
• db2cabf0...4c12d985 - 11 earlier commits
• f222ea86 - Some optimisations in frontend
• 6cae2deb - Reformat
• e747f66f - Make adding of group members to course groups configurable
• 8a10b823 - Change preference comment wording
• f510699c - Set both name and shortname on newly created course groups
• 53a38d26 - Move filtering of TCCs for ValidityRange to backend
• 80a427a9 - Merge branch '47-tcc-planning-add-option-to-create-course-groups' into...
• 303ce99e - Move course name generation to backend
• e9e81d97 - Remove unused copy from different VR button
• cb30b7ae - Make rows in course planning more dense

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added 1 commit

• 2c0743cc - Use i18n key for VR select label

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added 1 commit

• 95fcef55 - Make group select field more compact

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assigned to @hansegucker and unassigned @yuha

marked this merge request as ready

added 1 commit

• 3d6488a5 - Reformat

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resolved all threads

added 38 commits

• 3d6488a5...e5371361 - 37 commits from branch master
• 5b0aa218 - Merge branch 'master' into 13-fields-in-course-planning-should-be-as-small-as-possible

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@hansegucker this can theoretically be merged now

@hansegucker please have a look here

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