bUseAdaptiveUnityBuild and TickableObjects

Just a note that if you have bUseAdaptiveUnityBuild enabled (as it is by default) and you make changes to a FGlobalEditorNotification, such as ShaderCompilingNotification.cpp, that by pulling it out into its own translation unit, the order of initialization of FTickableEditorObject::TickableObjects (normally done in Editor.cpp) can change. You will likely end up with the Tickable that you are editing not being added properly to the TickableObjects array.