Fix issues with ScreenSpaceCameraController.
Fix issues with ScreenSpaceCameraController.

* Remove use of FrameState, which lagged behind a frame, causing inconsistencies between the controller and the camera.
* FrameState was being passed to Globe.pick instead of Scene.

likangning93/cesium,jason-crow/cesium,NaderCHASER/cesium,wallw-bits/cesium,esraerik/cesium,AnalyticalGraphicsInc/cesium,wallw-bits/cesium,CesiumGS/cesium,soceur/cesium,hodbauer/cesium,aelatgt/cesium,geoscan/cesium,YonatanKra/cesium,jason-crow/cesium,progsung/cesium,denverpierce/cesium,AnimatedRNG/cesium,omh1280/cesium,esraerik/cesium,omh1280/cesium,emackey/cesium,denverpierce/cesium,wallw-bits/cesium,emackey/cesium,aelatgt/cesium,josh-bernstein/cesium,soceur/cesium,hodbauer/cesium,kiselev-dv/cesium,josh-bernstein/cesium,oterral/cesium,jason-crow/cesium,oterral/cesium,CesiumGS/cesium,AnalyticalGraphicsInc/cesium,CesiumGS/cesium,kaktus40/cesium,ggetz/cesium,wallw-bits/cesium,kaktus40/cesium,YonatanKra/cesium,likangning93/cesium,omh1280/cesium,kiselev-dv/cesium,AnimatedRNG/cesium,esraerik/cesium,progsung/cesium,likangning93/cesium,hodbauer/cesium,likangning93/cesium,soceur/cesium,ggetz/cesium,esraerik/cesium,denverpierce/cesium,CesiumGS/cesium,oterral/cesium,YonatanKra/cesium,CesiumGS/cesium,aelatgt/cesium,AnimatedRNG/cesium,NaderCHASER/cesium,kiselev-dv/cesium,likangning93/cesium,ggetz/cesium,ggetz/cesium,denverpierce/cesium,AnimatedRNG/cesium,NaderCHASER/cesium,jasonbeverage/cesium,jason-crow/cesium,aelatgt/cesium,emackey/cesium,YonatanKra/cesium,kiselev-dv/cesium,emackey/cesium,geoscan/cesium,jasonbeverage/cesium,omh1280/cesium