last changes refs #2498
last commit closes #2498
Merge remote-tracking branch 'origin/feature/2498-ShowPicture' into feature/2741-AssembleApplication

Conflicts:
	pom.xml
	src/main/java/io/github/data4all/activity/ShowPictureActivity.java
Removed package-info from the test-directories refs #2741
Organise imports and auto-formatting refs #2741