Add label for default proposal sort order select
i18n: extract new messages
fixup e2740c9 for overlays
Merge branch 'develop' of github.com:liqd/adhocracy into develop
i18n: Update German translations
Link to *instance* optional attribute settings
Don't autojoin instances on user import
dont allow large headings in blockquotes
Allow empty watch div to be skipped
Remove redundant routing entry
Allow all user related urls to be in an instance
Allow multiple base groups in initial permission configuration

Conflicts:
	src/adhocracy/lib/install.py
Allow watch.create without instance join by default
mv notifications from lib.events to model
move migration after rebase
resolve circular imports
add database sink to notification pipeline
define event type mappings
create event type sets
distinguish between event type and notification type