Changing an include file used by a raytrace shaders doesn't trigger a reimport of the raytrace shader.

How to reproduce:

1) Have a ray tracing ready system - Nvidia RTX GPU (latest graphics drivers) and Windows 10 version 1809+.
2) Open attached project - RaytraceIncludeBug.zip.
3) Open scene SampleScene.
4) Change to GameView and notice the screen is yellow. This is the output of the raytrace shader RayTracingTest.raytrace. The color is hardcoded in the include file TestIncludeFile.hlsl - GetColor function.
5) Change the color returned by GetColor function to another color, save the file and return to the Editor. The screen color in GameView should change to the new color.

Actual result:

The raytrace shader is not reimported automatically (the screen in GameView is still yellow).