Merge remote-tracking branch 'origin/feature/2498-ShowPicture' into feature/2496-PhotoDrawMenu
merge with refs #2498
refs #2496  Buttons der menüs hinzugefügt(erstmal text) still TODO: richtige Activity starten ; icons raussuchen
Merge remote-tracking branch 'origin/feature/2496-PhotoDrawMenu' into feature/2741-AssembleApplication refs #2741

Conflicts:
	res/layout/activity_picture.xml
	src/main/java/io/github/data4all/activity/ShowPictureActivity.java
Moved the paint component to the show-picture activity refs #2741
shorten package names refs #2741
Auto-formatting and import optimisation refs #2741