Merge topic 'plug-a-memory-leak'

54312bc7 A change to the texture has to cause a redraw.
9d89712e Plug a vtk2osp leak and avoid a copy while exposing more formats.

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Ken Martin <ken.martin@kitware.com>
Merge-request: !4318