all code that used calcDesktopLayout() so the function could be removed.
Minor changes to the DesktopLayout class itself.
svn path=/trunk/KDE/kdebase/workspace/; revision=925930
adding more complex desktop layout features (Such as desktop
rearranging, and non-rectangular layouts) easier in the future.
Workspace::calcDesktopLayout() has been deprecated.
svn path=/trunk/KDE/kdebase/workspace/; revision=925812