[3053689] Terrain sample: Add Numpad +/- as alternative key bindings
[3053689] Terrain sample: Add Numpad +/- as alternative key bindings

--HG--
branch : v1-7

nezticle/ogre,vancepym/ogre,vancepym/ogre,nezticle/ogre,jhu-lcsr-forks/ogre,largerussiangames/ogre,jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre,largerussiangames/ogre,vancepym/ogre,largerussiangames/ogre,vancepym/ogre,jhu-lcsr-forks/ogre,nezticle/ogre,largerussiangames/ogre,nezticle/ogre,vancepym/ogre,jhu-lcsr-forks/ogre