Use real italics/bold font variant for Codemirror (treehouse)

[taramk]

When you format as italic in a Document node, the browser is using fake italics. We should instead use the italic variant in the Figtree font.

Please also check that bold is using Figtree bold.

[taramk]

we probably don't have Figtree italic loaded, i think that's the first thing to check.

[taramk]

the font is loaded on the html page (for both treehouse and treestar), it's not part of the source code for the main app.