[NTG-context] Reconfigure mpgraph

[Sebastian Sturm]

> Can't you use an Euler text font? These have the dot in the right place.
> 
> Cheers, Taco

Hi,

I'm not sure what font you're referring to; it would at least have to include
all the Euler digits. I tried zeurm10, but it has a right-pointing triangle at
position 2e. The fonts in my bluesky/euler subdirectory (euex, eufb, eufm,
eurb, eurm, eusb and eusm) also don't work. Can you tell me the name
of the text font including the dot?

Thanks for your answer,
Sebastian