[Bf-funboard] Assign Mat in fsel mode

[Campbell Barton]

Hay-Ho
I think its needed  to assign multiple materials in face select mode 
(just like it works in edit mode)
The buttons are not hiden so I thaught they worked.

The problem is that I often have a face selection from UV mapping an 
image and I want to use it to use thuis selection to assign materials.
going into edit mode stuffs things up because any face inbetween 
selected faces also get selected.

- Cam