* Split RenderableSphere class into a local and an online sphere
* Make the video sphere derive from the regular sphere
* Make RenderableTimeVaryingSphere derive from RenderableSphere
* Some clean up
* Add general functions for renderable matrix calculations
* Make RenderableSphere and Plane use them
* Fix an issue with the RenderablePlane shader
* Make one function that returns all three types of render matrices
* Make more Renderables use the general matric calculation function
* Make more Renderable use the general matrix function
* Simplify alternative transforms for matrix calculations
* Small clean-up
* Update RenderableModel (again) to use new transform functions
* Make calc all matrix function to return tuple
* Update some more places
* Add actions for zodiac constellations + some improvements
* Add fade to actions
* Add fade scripts that is able to take regex identifiers and fade screen space renderables
* Add settings to Renderable to control whether the renderbin is updated based on Opacity
* Remove duplicate RenderBin specification for RenderableSphere
* Remove unnecessary RenderBin specifications of Lagrange points
* Don't automatically update the renderbin for RenderableLabel and RenderablePlane
* Remove extra `setRenderBinFromOpacity` from RenderableSpheres
* Move information about whether a renderable should be updated when disabled
* Some cleanup of Renderable class
* Don't update the renderbin automatically if the user specified the renderbin manually
* Add property in OpenSpaceEngine for fading duration when enabling / disabling
* Add interface for fadeable components and apply to renderable
* Make layers a fadeable component
* Make globelabels a fadeable component
* Make labelscomponent a fadeable, and give it an enabled property
* Make screenspace renderables fadeable components
* Introduce concept of parent fadeables, to fade out subowners with parent
* Make rings fadeable as well
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Co-authored-by: Alexander Bock <alexander.bock@liu.se>
