minor cleanup of btgui/demo3 stuff, much more demo cleanup is needed

moved some files in btgui/Bullet3AppSupport

Demos3/GpuDemos/rigidbody/GpuSphereScene.cpp

@@ -14,7 +14,7 @@
 #include "Bullet3OpenCL/RigidBody/b3GpuNarrowPhase.h"
 #include "Bullet3Collision/NarrowPhaseCollision/b3Config.h"
 #include "GpuRigidBodyDemoInternalData.h"
-#include "../gwenUserInterface.h"
+#include "Bullet3AppSupport/gwenUserInterface.h"
 
 
 
@@ -201,4 +201,4 @@ void GpuSphereScene::setupScene(const ConstructionInfo& ci)
 	int numInstances = index;
 	sprintf(msg,"Num objects = %d",numInstances);
 	ci.m_gui->setStatusBarMessage(msg,true);
-}
+}