Allow operations on persons and person-related objects only if they are a member of a group the editor owns

Allow the owner of a parent group to be able to perform the same operations on the related object as the owners of all other groups the object is a member of

Prepare release 2.0.1

See merge request !271

Resolve "Class register / personal notes unusable on mobile devices"

Closes #206

See merge request !269

# Conflicts:
#   CHANGELOG.rst

Merge branch '208-lesson-status-shows-missing-data-although-lesson-documentation-is-filled' into 'master'

Resolve "Lesson status shows "Missing data" although lesson documentation is filled"

Closes #208

See merge request !270

Prepare release 2.0

See merge request !268

Add docs

See merge request !263

Jonathan Weth authored 3 years ago and Nik | Klampfradler committed 3 years ago

Co-authored-by: Frank Poetzsch-Heffter <p-h@katharineum.de>

Merge branch '202-indexerror-at-app-alsijil-event-246-list-index-out-of-range-ticket-75576' into 'master'

Resolve "IndexError at /app/alsijil/event/246/: list index out of range [Ticket#75576]"

Closes #202

See merge request !266

Enable docker build

See merge request !265

This reverts merge request !264

[Docs] Enable build

See merge request !264