color box positioning for splot

[Petr M. <mi...@ph...>]

I'd like to ask here again: Could somebody have a look how to fix position
of the color box when a surface is rotated (by mouse or by 'set view'
commands). It's fine for 'set view map', but not for other views. E.g.
	set pm3d
	splot x*y
.. and rotate the surface by mouse

Colorbox should stay at that position where it is for the default view.

I had a look to the source of 3d positions, but I failed to figure it out. I
hope somebody will be more lucky.

This fix would be nice for the forthcoming 4.0 release...

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Petr Mikulik