[Observium] Graph direct link changes when group membership changes

Hi!

I'm using the direct link to graphs for a dashboard. Not sure this was the intended usage, but I found an issue that I think could be avoided related to this.

It looks like graphs in this view are getting encoded IDs that somehow relate to the devices in the group, so the URL looks like this below.

The issue is that when having lots of devices in a view, the id field gets really long and eventually will cause the graph creation to fail....however another and bigger issue is that it seems the id actually change when new devices are added (which happens during auto-discovery).

Is there any way to fix the id to a numeric number like used with other graphs ?

http://observium/graph.php?to=1487801959&id=WyIzMjE5MSIsIjMyNTE1IiwiMzMx...

/Jesper