Improve ordering of generated XML elements #17
Description
The ordering of elements in XML generated from the flow diagrams can be unexpected and unintuitive when compared to the diagram. For example, when we have two source components targeting the same channel, if the second source is added later, it will be included at the bottom of the XML.
We should look into some form of topological sorting of the flow graph to generate a more predictable element ordering.
A screenshot illustrating the example mentioned above:
It would make more sense if the createdLast element was listed around createdFirst.
