JavaFX: Initial import of SF controls.

* Taken from the SystemFOCUS project.
* Initial import that is lacking integration in the SWT-JavaFX
  "framework".
* Integration with the "framework" and FXML is done in separate commits
  to decouple the import from the integration work.

Issue-Ref: 3209
Issue-Url: https://af3-developer.fortiss.org/issues/3209


Signed-off-by: Alexander Diewald <diewald@fortiss.org>