Bug 159619

With a simple Faces config file, the PageFlow editor flow lines are curved, laid out away from the pages and easy to
read. They do cross over but that is not a major issue. It doesn't seem possible to adjust the layout, by dragging the
end-points on the lines, although the mid-points can be dragged.

As the config file becomes more complex (I think that's the reason, rather than having used the reset layout tool), it
reaches a point where the editor abandons the idea of curved lines and insists on drawing them straight. I can't find a
way to add a mid-point to these straight lines. Where there is a flow back to the same page, straight lines are very
hard to see. The straight lines also make an intelligible layout hard to achieve - it's not possible to route a line
around a page and the layout just becomes spaghetti.

Resetting the page layout in these circumstances makes a real mess.