Results 2 issues of Charley Glynn

Enable colour gradients from a flows source node to the target node like this [example.](https://3.bp.blogspot.com/-KuWQyxIBhOc/WkaAuj36Q5I/AAAAAAAAF94/0NsnpjuU5LAHqkPPhgbr2UPq-_Civl2igCLcBGAs/s1600/France_Election.png)

enhancement
medium-priority

I have used map units but set the values using GB data in British National Grid. When using data in a different CRS the map units are different and so...

enhancement