Introduce Vuetify and GraphQL

See merge request !1045

# Conflicts:
#   CHANGELOG.rst

Fix docker image

See merge request !1068

Resolve "Celery does not honour logging configuration"

Closes #713

See merge request !1067

Do release 2.10.1

See merge request !1065

Translations update from Weblate

See merge request !1059

Currently translated at 100.0% (691 of 691 strings)

Translation: AlekSIS/AlekSIS-Core
Translate-URL: https://translate.edugit.org/projects/aleksis/aleksis-core/de/

Resolve "[External link widget] Make icon clickable"

Closes #710

See merge request !1064

# Conflicts:
#   CHANGELOG.rst

Merge branch '709-celery-progress-doesn-t-show-status-messages-between-last-progress-and-the-success-poll' into 'master'

Resolve "celery-progress doesn't show status messages between last PROGRESS and the SUCCESS poll"

Closes #709

See merge request !1063

Build webpack_bundles outside assets for that