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/Editor/Viewport.cpp

@@ -189,7 +189,6 @@ QtViewport::QtViewport(QWidget* parent)
     {
         m_constructionMatrix[i].SetIdentity();
     }
-    m_viewTM.SetIdentity();
     m_screenTM.SetIdentity();
 
     m_pMouseOverObject = 0;