Merge tag 'v0.9.1' into develop

v0.9.1
Merge tag 'translation' into develop

v0.9.1a
Bugfix in form when adding multiple involvements at once
Refactoring query params
Merge branch 'hotfix/showcases4and5' into develop
Merge branch 'develop' of github.com:CDE-UNIBE/lokp_custom_lo into develop
First implementation of deleting Items
Merge branch 'develop' of github.com:CDE-UNIBE/lokp_custom_lo into develop
Merge branch 'hotfix/reordershowcases' into develop
Merge tag 'history' into develop

v0.9.1a
Merge remote-tracking branch 'origin/develop' into develop
Some form layout improvements
Updated tabs in grid view
Improved delete functionality
Release v0.9.5
Merge branch 'release/v0.9.5'