I would like to make the default font of .m/.wl editor in Mathematica 11 to be that of Mathematica 10 (a smaller narrower fixed width sans serif font). Simultaneously, I would like to make the default font of .nb files the Courier font of version 10 and before. By "default", I mean the font should be used automatically every time I open a new window in Mathematica 11.
Following the answer to this question I am able to change the default font of all files, but not in the more specific way requested above.