Initial/canned file's thumbnailUrl is not available until a few ticks after qq.status.UPLOAD_SUCCESSFUL

[rnicholus]

Discovered in React Fine Uploader at FineUploader/react-fine-uploader#91. To properly file, the internal state must be completely updated (which includes the thumbnailUrl) with the data from the parsed initial file record before qq.status.UPLOAD_SUCCESSFUL is triggered. The issue can be seen in the _addCannedFile method, which will have to be adjusted to ensure the event/status change is not broadcast until all internal state is updated.