[gtkmm] One thing we didn't really discuss: ustring vs string

[ERDI Gergo <cactus cactus rulez org>]

I remember I mentioned something like this on the mailing list during
GUAD3C, but there hasn't been a discussion about it: when to use ustring,
when to use string, adn when to use StockID.

I see we currently use ustring for nearly everything -- including file
names, stringified colors, stringified TreeModel paths, and other
non-user-visible strings. Is this a design decision or mere oversight? Is
this a Good Thing? Is this Good Enough?

We need to discuss its implications ASAP if we want to freeze, as this
could possibly affect a huge part of the API.

-- 
   .--= ULLA! =---------------------.   `We are not here to give users what
   \     http://cactus.rulez.org     \   they want'  -- RMS, at GUADEC 2001
    `---= cactus cactus rulez org =---'
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