Sort by completedate field in Task Report Macro broken

Issue Summary

When we set the "completedate" field to be shown in the report, it is not sortable.

Steps to Reproduce

1. Insert the Task Report macro in a page;
2. In the "Task status" field, set it to get completed tasks;
3. In the "Columns to display" field, insert the completedate;
4. Publish the page;
5. In the report table, click over the Completed Date header to sort it.

Expected Results

The information in the report is shown sorted by completed date.

Actual Results

Nothing happens.

Notes

• It could also be an option in the macro properties to be able to let it sorted by completed date

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available