* Fix Triton asset file
* Display an error if no Property matches a regex in setPropertyValue
* Correct user-facing name for some Moon assets
* Add fade in and fade out helping functions
* Reenable label fading in New Horizons
* Added GUI hint to hide uninteresting nodes
* Set Hidden Hint on barycenter nodes
* Introduced guiName to PropertyOwner
* Added requirement that PropertyOwner::identifier may not contain whitespaces
* Changed Name to Identifier in asset and scene files
* Added new PropertyOwner to RenderEngine that owns the ScreenSpaceRenderables
* Moved Name and GuiPath into GUI group
* Added user-facing names to layer groups