config and doc furthermore automated; played with css variables (header on/off)

docs/booklet-config.md

docs/test-mode.md

src/app/app-root/privacy/privacy.component.ts

src/app/config/booklet-config.json

src/app/config/booklet-config.ts

src/app/config/mode-options.json

src/app/config/test-mode.md

src/app/config/test-mode.ts

src/app/config/test-modes.json

src/app/test-controller/test-config.ts

src/app/test-controller/test-controller.component.css

src/app/test-controller/test-controller.component.html

src/app/test-controller/test-controller.component.ts

src/app/test-controller/unithost/unithost.component.css

src/app/test-controller/unithost/unithost.component.ts

src/scripts/generateTestModeClass.js

src/styles.css