This makes all filter tools (mesh, cloth, color) use the same general
automasking settings and features as the brush tools. Filters will now
use the settings in the options panel to limit the effect.
This also removes the "use Face Sets" option from the Mesh filter code,
as it was duplicated from the automasking code just to have that
funcitonality. This is now handled by the regular automasking system.
The "Use Face Sets" option is still available in the cloth filter as that
option limits the action of the forces, not the displacement.
After this, it is possible to initialize the automasking system
independently from the StrokeCache and Brush settings, so it can also be
added to more tools and features in the future.