• set the palette on theme changes only * don't grab the data until actually shown * show the right size and position when we are showing the tip * allow the tooltip to figure out it's size with the help of the widget (it knows when to do this, the widget only knows how) * don't show the tip on every item's mouse over, respect the small timeout * only create a ToolTipData struct for those items that actually use it (memory savings as well as makes the check for showing the tip a lot simpler)

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=771314