changegroup: close progress in same function as it's started changegroup.group() and changegroup.generatefiles() both currently start progress (with topic "bundling"), but changegroup.generate() closes the topic. Move the closing to the functions that start the topic, so it's easier to see where the topic is started and closed. This completes a move that seems to have been started in 0b564cf359a7 (bundle-ng: move progress handling out of the linkrev callback, 2013-05-10).