* Add virtual property owner to OpenSpaceEngine
* Ability to add and remove virtual properties
* Do not try to render empty PropertyOwner name
Compile fix for iswaComponent
Add example in default.scene
* Delete virtual properties also in the OpenSpaceEngine dtor
* Make RenderablePlanet not crash if the nighttextures are not present
* - Add VirtualPropertyManager to manage ownership of virtual properties
- Only execute regex when it was necessary
-
* Implement new RenderableTrails as abstract base class
- Implement RenderableTrailsOrbit and RenderableTrailsTrajectory as concrete instances
Remove old RenderableTrails and RenderableTrailsNew classes
Adapt mod files to the new structure
* Addressed Pull Request comments
Restructure GuiPropertyComponent to take a source function that returns a list of PropertyOwner%s instead of registering individual properties
Apply restructuring
