RFE: Export full graph at readable scale

[jshaughn]

The Kiali project had an RFE submitted for graph export at a readable scale. This means the user wants to be able to export a full layout at a scale that allows for labels to be readable, etc. In short, like a screenshot if the screen were big enough to render the entire topology at that scale. I don't know if this is feasible; my experience is only to be able to export the html elements that are currently visible on-screen.

I tried to adapt the solution used by NetObserv in this PFT Slack thread, but was not able to get it to work past what was on-screen (although it works nicely for that ability).