* Always add GUI properties, even if tag is not in the asset
To make objects wihtout GUI tag be included in the UI
* Hide the hover circle, to clean up scene menu list a little
* set root node gui hidden property to true
* Properly add the gui properties for all scene graph nodes (even root)
* Update GUI hash
* Add enabled property to exoplanets and sky browser module
* Create assets for default settings and restructure assets into a components folder
* Update exoplanets data
* Set sky browser enabled to true per default and include hover circle asset
* Add name and description of hover circle, and used synced version of ring image