* TODO updates.
* ST bugfix: adding an exercise via drag & drop of a HRM exercise file is now
   also possible when there are no exercises yet (but a sport type must exist).
* ReadMe and ChangeLog updates.
* Exercise Dialog: bugfix for NPE when adding new exercises.
* Update to ControlsFX 8.20.7, which also provided openjfx-dialogs 1.0.2.