Merge tag 'v0.8.9' into develop

v0.8.9
First adaptation of download functionality
Small refactoring of download function
First fix of identically translated keys
Revamped download function to better cope with translations
Download of Stakeholders also available
Merge branch 'feature/download' into develop
Added download filter by columns, first view
Some code cleaning, matching PEP 8
Small bugfix in filter and download
Some more code cleaning, matching PEP 8
Bugfix in review
Release v0.9.0
Merge branch 'release/v0.9.0'