public void register(@Nonnull IdentifiableStage identifiableStage) {
		register(identifiableStage.getId(), identifiableStage.asStage());
	}
Registers listeners on the stage to monitor active state.

@param identifiableStage
		Stage to register.
recaf-ui/src/main/java/software/coley/recaf/services/window/WindowManager.java