small reorganization of graphics dialog

[Leuven, E.]

hi guys,

atm the graphics dialog looks like this:

http://leuven.ecodip.net/lyx/g.png

i reorganized the first tab as follows:

http://leuven.ecodip.net/lyx/g1.png
http://leuven.ecodip.net/lyx/g2.png

what do you think?

ed.