Resolve "Do not allow entries in holidays (configurable)"

Closes #112

See merge request !101

Resolve "Fix circle icons"

Closes #118

See merge request !114

Resolve "Group members are counted multiple times in "My groups""

Closes #123

See merge request !113

Currently translated at 100.0% (181 of 181 strings)

Translation: AlekSIS/AlekSIS-App-Alsijil
Translate-URL: https://translate.edugit.org/projects/aleksis/aleksis-app-alsijil/de/

[Lesson view] Use correct label for remarks field in personal notes form

See merge request !112

Resolve "Add "Are you sure?" page for register absence form"

Closes #105

See merge request !109

Update lockfile.

See merge request !110

Set user in revisions to allow further tracking

See merge request !108

Merge branch '117-create-revisions-in-django-reversion-for-all-changes-that-need-auditing' into 'master'

Resolve "Create revisions in django-reversion for all changes that need auditing"

Closes #117

See merge request !107

Resolve "Re-enable lint job and reformat"

Closes #119

See merge request !105

Use setuptools entrypoint to register app

See merge request !106