Export of contributions will not include contributions with status "Cancelled" or empty

Contribution export should include all rows from search results - including rows with Cancelled or NULL Status. (Users can exclude Cancelled contributions from their search criteria if they don't want those included in the export.)

— Original Post —
When exporting contributions, the screen prior to export will display a count of all the selected rows, but any contributions with an empty status field or a "Cancelled" status field will not be exported.

To recreate this:
1. Selected one contribution record of type "Completed" and one contribution of type "Cancelled"
2. Initiate the "Export" action, and observe the message that says "2 records will be exported"
3. Complete the export. Only the contribution with "Completed" status will be included in the output CSV file.

Note the same behaviour occurs for rows with an empty status.

Fix depends on desired beahviour for cancelled contributions, but presumably the ability to export contributions that have cancelled status is desired.