Merge branch 'hotfix/3.8.1'
Merge branch 'release/3.9.0'
Merge remote-tracking branch 'upstream/master' into develop
CTL-479 Make IDataErrorInfo/IDataWarningInfo methods customizable in ModelBase
Merge pull request #24 from DanielKuehner/develop

CTL-479  Make IDataErrorInfo/IDataWarningInfo methods customizable in ModelBase