Removing route turnpoints

Many people were having trouble with removing turnpoints from their route. The problem was that the timing of a double-click could invoke the single-click routine twice. To avoid this problem, I've changed the way it's done. Instead of double-clicking to remove a turnpoint, you can now just single-click on it. This shows the location as before, but also shows a link at the bottom ('Remove this turnpoint'), which allows you to remove it.