[REQUEST] Expose Global Time Dilation to Blueprints

There is currently a way to set Global TD, but no way to get it. This would be very useful for making everything else run slowly but keep certain actors going at full speed by multiplying their local TD by the inverse of the GTD.

Thanks!

Done: https://github.com/EpicGames/UnrealEngine/commit/98510987af68df1ba976fa95577ef5e55a292bb5

~love you~