* When resizing the window, the top position is now preserved, instead of the center position. * Fix zoom level not being preserved in various cases, when changing both with and height. This replaces some earlier code which did this at screen level but wasn't very reliable. * Different tabs now each preserve their own scroll. * When switching between tabs, it now scrolls to show as many buttons as possible, instead of possibly showing empty space. There is a trade-off here between doing that keeping the buttons in the same place, no ideal solution exists I think. * Change zooming in/out to be symmetric, for example doing numpad + then - did not give the original zoom level back. * Added some calls to avoid hanging tooltips when manipulating the view. Internals: * Added V2D_KEEPOFS_X and V2D_KEEPOFS_Y to keep the top/bottom rather than the center. * Renamed V2D_KEEPZOOM to V2D_LIMITZOOM (seems more appropriate), and make V2D_KEEPZOOM preserve the zoom level.