Various cosmetic fixes to the GTK config box: vertical alignment of

Various cosmetic fixes to the GTK config box: vertical alignment of
edit box labels, Left/Right on the treeview to collapse and expand
branches, a window title, and the best treatment of wrapping text
widgets I could think of within the product-order-oriented GTK
layout model. I think this thing is now pretty much as good as it's
going to get before GTK v2 (which should fix one or two remaining
minor nasties which I really couldn't be bothered to work around in
GTK 1.2), so the next step is to actually start _using_ it.

git-svn-id: svn://svn.tartarus.org/sgt/putty@2979 cda61777-01e9-0310-a592-d414129be87e