debug++
have (1) and (2) mostly figured out. Need to clean up the changes for those yet.
Merge remote-tracking branch 'upstream/master' into 2013march/issues/314
issue314: fixes for issue (1) and (2).

Selecting a glyph for the first and second item in the kern class
should now update the preview.

Also, closing the class kerning dialog will have the metrics view
select the new kerning class item (if there were none before) for you.
Merge pull request #467 from monkeyiq/2013march/issues/314

2013march/issues/314