Resolve "Support for the notion of groups"

What does this mr do?

Adds a warning message that labs will break if no groups are imported. When no groups are imported and trying to create a lab it will give a warning that groups need to be imported. It will also restrict access to the lab creation page if a course has groups and there are no mentor groups available. This such that there is no way a course can create a lab without any students in it.

Also solves a small issue where a teacher accidentally checks the "uses groups" checkbox and now it can be disabled once.

Screenshots

after

Does this MR meet the acceptance criteria?

• I have added a changelog entry to reflect the significant changes I made.
• Tests were created to test the feature.
• I have updated the documentation accordingly.
• I adhere to the style guide.

Closes #100 (closed) Closes #117 (closed)

added priomed typefeature-request labels

added 1 commit

• c630d7e2 - Update CHANGELOG.md

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• 13d016b1 - Disable access to lab creation page if no mentor groups

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changed the description

marked the checklist item I have added a changelog entry to reflect the significant changes I made. as completed

added 1 commit

• 2a054d9e - Use course groups instead of first year mentor groups

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added 1 commit

• d6987179 - Use course groups instead of first year mentor groups

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changed the description

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• daa1daf5 - Use course groups instead of first year mentor groups

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resolved all threads

added 64 commits

• daa1daf5...1a2cf826 - 63 commits from branch development
• 7bca3356 - Merge branch 'development' into '117-support-for-the-notion-of-groups'

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added 1 commit

• 4d0675f1 - Fix the merge conflict resolution of GitLab

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approved this merge request

started a merge train

mentioned in commit 644bc777

merged

unassigned @tnulle