Invalidate scene after switching renderers

Change-Id: I07d210548bea361629a7a93efed30c84fdb7ad93
Move VTK forward

Change-Id: If7561a4bc089e419d1f18f63667d01d5db8c3eb7
Merge topic '14894-fix-vgl-renderer' into next

69164d25 Move VTK forward
f9b8a652 Invalidate scene after switching renderers