resizing is same speed, still pixmap->bitmap->region
just repainting should be quite faster
one of the last bic changes
svn path=/trunk/KDE/kdelibs/; revision=897385
resized and save all of them at once at a timer event.
this way when a big number of scales is done in little time (e.g. applet
reszing) prevents too many disk writes and qimage conversions
svn path=/trunk/KDE/kdelibs/; revision=890663
