title: Cesium Fly Camera to Location but Maintain Camera Height
body: <p>I would like to use flyTo() and provide a lat long co-ordinate but keep the camera at the same height / zoom / distance from the surface as it currently is.</p>
  
  <p>I've tried to use the camera.position.z in my call to flyTo but this seems to zoom in further and further on each call to flyTo().</p>
  
  <p>Does anyone know how to achieve this?</p>