Commit Briefs
applied Ryan Zheng's patch and re-releasing 5.7.2 (tags/5.7.2)
fixed the layout symbol bug reported by Nibble (but using a different approach as he suggested) (tags/5.7.1)
- optimised drawbar() and arrange() handling for multiple monitors, arrange only arranges the relevant monitors when applicable, same with drawbar - need to release 5.7.1
switching to release flags (tags/5.7)
