Merge tag 'v0.8.3' into develop

v0.8.3
Messed up merging of hotfix
Moved built OpenLayers to new location inside repository
Re-extracted translation strings
Updated translation and separated it more cleanly from customization
Bugfix in moderation
Merge branch 'feature/fixes' into develop
Release v0.8.4
Merge branch 'release/v0.8.4'