- backport fix for translation fallback to English

- backport fix for annotation command

prepare for release 1.9

Merge branch 'v1.8' into 'master'

Bump version numbers

See merge request se2/litterbox!545

Merge branch 'bump_version' into 'master'

Bump version number

See merge request se2/litterbox!528

Bump version number

Merge branch 'spanish_translation' into 'master'

Spanish translation

See merge request se2/litterbox!305