TODO for PuTTY GTK2 port before merging back into main trunk code
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Things left to do:

 - Make sure we haven't broken GTK1.
    + In particular, I know I _have_ broken GTK1 by taking out all
      the GTK1-style list box code. Put it all back in under ifdefs,
      which will be unpleasant but necessary.

 - Merge to trunk. Colin is already mentioned in the licence in all
   the branched copies, but mention him in the _website's_ licence
   page too.