Feature/interactionsphere (#1561)

* Add ability to render the bounding sphere as a debug option
* Separate boundingsphere and interactionspheres
* Correctly compute BoundingSpheres for more renderables (RenderablePlanesCloud, RenderableOrbitalKepler)

modules/space/rendering/renderablehabitablezone.cpp

@@ -143,6 +143,7 @@ RenderableHabitableZone::RenderableHabitableZone(const ghoul::Dictionary& dictio
     _width.setReadOnly(true);
 
     computeZone();
+    setBoundingSphere(_size);
 }
 
 void RenderableHabitableZone::render(const RenderData& data, RendererTasks&) {