Camera Component, Editor Viewport Widget refactoring.

- Handle changing of active camera entirely inside CameraComponentController
- Remove a LOT of legacy Cry things related to cameras
- Add a CameraSystemComponent to handle ActiveCameraRequestBus and CameraSystemRequestBus

Signed-off-by: Yuriy Toporovskyy <toporovskyy.y@gmail.com>

Code/Framework/AzFramework/AzFramework/Components/CameraBus.h

@@ -114,6 +114,9 @@ namespace Camera
         //! Makes the camera the active view
         virtual void MakeActiveView() = 0;
 
+        //! Check if this camera is the active render camera
+        virtual bool IsActiveView() = 0;
+
         //! Get the camera frustum's aggregate configuration
         virtual Configuration GetCameraConfiguration() 
         {