A regular common dialog with apply, cancel and OK buttons allowing
surface fill type selection for Bezier and b-spline surfaces.
The Bezier and b-spline surface functionality now seems to be complete.
Modifications for:
- let the surface workbench appear
- use only one Surface menu and toolbar instead of two separate ones
- create a Bezier surface using 2..4 Bezier curves (does not work yet)
- use enums for fill type
Signed-off-by: balazs-bamer <kolaloka@freemail.hu>
