Merge pull request #6556 from RosettaCommons/roccomoretti/fix_uploader_refresh
[Foldit] Fix issue with uploader/downloader refresh.
When I made the updates for #6537 and #6539 which added a downloader progress dialog, I moved the download/upload into a thread, but the refresh-after-download was left in the original thread. This meant that there was an inadvertent reordering, meaning that the refresh wasn't seeing the updated results (because it was being executed before the update in the thread completed.)
This PR moves those refreshes into a callback function which is called after the downloader completes.
RELEASE NOTES: Fix bug with solution upload/download where additional refreshes were needed to see the new state.