Maintenance Release 5.1.2

Released: 2021-01-19

🐛 Bug fixes

• Bugfix Fix maximum_listing_select in config.yaml for Relation (ionutlip, #3052)
• Fix wrong subtask called in Makefile for Docker (fsidobre, #3048)
• Fix date format to save PM time (fsidobre, #3046)
• Fix Romanian transliteration (bobdenotter, #3043)

🛠️ Miscellaneous

• Users overview page Dutch translations (nestordedios, #3049)
• Update package-lock.json (Joossensei, #3045)
• New feature: Allow empty value for select form controls, based on user setting. (vlad-ghita, #3041)
• Update serializable interface (bobvandevijver, #3039)
• Prepare release 5.1.1 (bobdenotter, #3036)
• Minor cleanup on services.yaml (bobdenotter, #3035)

⚙️ Code Quality / Developer Experience

• Typehint QuestionHelper (make PhpStan happy) (bobdenotter, #3044)
• Fixing logo alt (bobdenotter, #3042)