Blender Git Loki

Cleanup of 3D viewport header in painting modes:

- Hide Manipulate center points in sculpt and particle edit modes
- Hide 3D manipulators and orientation from sculpt mode
- Hide snap buttons in sculpt, weight, texture, vertex and particle painting modes

All this options weren't make sense in this modes and might only confuse user.

This will resolve issue #30180: 3D View header buttons and modes