VTK/Web: Fix missing scalar export for sync renderwindow
This commit handle the case of vtkMapper::ScalarMode(0) to properly export Scalars This commit also add missing exporter for CubeAxes and ScalarBar
Backport: release
This commit handle the case of vtkMapper::ScalarMode(0) to properly export Scalars This commit also add missing exporter for CubeAxes and ScalarBar
Backport: release