[Contextcapture Editor] stencil tool

The Stencil Tool has not been include with CC Editor. This is similar to the "Drape Element" and "Snap Element" tools which is what you should now be using in CC Editor with Reality Meshes or Point Clouds.

We need also Stencil tool it works much better as drape. It is not clear why Stencil is considered as part of Textures/Material tools.