* Allow flipping sort order in mobile app's file transfer Signed-off-by: Nguyen Quy Hy <nguyenquyhy@live.com.sg> * Change ascending to be non-nullable Signed-off-by: Nguyen Quy Hy <nguyenquyhy@live.com.sg> * Revert file_model change Signed-off-by: Nguyen Quy Hy <nguyenquyhy@live.com.sg> --------- Signed-off-by: Nguyen Quy Hy <nguyenquyhy@live.com.sg>