* Resets animation parameters and camera settings to initial/default values
* Considered as activity: mouse press events
* Inactivity timeout: 10 minutes
* Currently only enabled in demo mode

* Command line option needs fixing, too (enable shortcut!)
* Demo mode itself still needs improvements

* It's pointless anyway
* Avoids shortcut ambiguities

* Supported languages: en de

* Using rotation angle directly (instead of independent stepping)
* One signal/slot link for position update and reset
* Also: added pulse profile update (reset) to stop animation slot

* Use double precision
* No explicit float literals

* Using fixed initializations instead of GUI values (required for consistency)
* Added missing initializations
* Fixed coordinate system and angle transformations (GUI vs. physics)
* Fixed trigonometry blunder (deg vs. rad)
* Also: optimized camera updates
* Also: more comments
* Pending: marker increasingly out of sync (over time)

* Required when menu is hidden
* Also: using shortcuts retrieved from widgets (not hardcoded)

* Alternative shortcuts are required when menu is hidden
  -> Actions won't be trigged otherwise
  -> Save/restore widget visibility states
  -> Shortcuts pending for actions: run, pause, stop
* Black window background when in fullscreen mode
* Also: finally implemented menu hide feature
* Also: added license info to about dialog