Flow Diagrams: more enhancements

[davidwatkins73]

Continuation of #5454

• [ ] auto layout option (either send to server or use a 'headless' d3 graph layout)
  • see this stackoverflow answer for hints
• [ ] add owning entity to diagrams (1.35 ?)
• [ ] bulk add options
  • [ ] add all associated flows between apps (? - this might be a bad idea)
  • [ ] 'wire-up' a node, ie connect a node to other nodes which already exist on the diagram
  • [ ] add all upstream/downstream regardless of whether already on diagram
• [ ] Offer a dialog to choose paths between nodes (i.e. user asks for a flow to app 'Z' from app 'A' and we show various route options, allowing them to pick)
• [ ] Export to solidatus :)
• [ ] Overlay/Filter by datatypes
• [ ] Look at how sequencing could be performed