List of fonts in Document popup

[Christopher Jones]

I found something in the archives from someone who wanted to know where LyX
gets the list of fonts that shows up in the Document popup. The answer was,
well, typical of this list ;-) -- namely, 'you don't want more fonts there--
load them by hand from the preamble'. Now, I don't want -every- font in there,
but I would like a few more than I have now. So:

Where does LyX get that list, and how do I get more fonts into it?