if the items were the same height.
- Modified _RecalcItemTops to allow us to specify a range instead of
just a starting point. This is useful for cases like Swap, where
only the items in between those being swapped need to be
recalculated.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24139 a95241bf-73f2-0310-859d-f6bbb57e9c96