Position config dialog as per iTunes (centered horiz, 86px from top)


git-svn-id: http://cantata.googlecode.com/svn/trunk@5570 b1e49159-3266-923f-9c3e-04f16369770a
Add a minimum pad of 16pixels at each end of toolbar.


git-svn-id: http://cantata.googlecode.com/svn/trunk@5571 b1e49159-3266-923f-9c3e-04f16369770a