Merge topic 'block-properties-modified' into paraview/release

84db57b8 Invoke Modified() when block attribute is changed

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Utkarsh Ayachit <utkarsh.ayachit@kitware.com>
Acked-by: T.J. Corona <tj.corona@kitware.com>
Merge-request: !6434