CSV Filename & Filesize column headers do not sit correctly

If you view the CSV results of a webform that has file attachments, the headers for the file columns (e.g. Filename, Filesize) do not push the subsequent column headings across. Here's an example:

Currently:

+------------+-----------------+
| Field name + Next field name |
+------------+-----------------+-------+
| Name       + Filesize (KB)   | Value |
+------------+-----------------+-------+

Expected result:

+------------+---------------+-----------------+
| Field name +               | Next field name |
+------------+---------------+-----------------+
| Name       + Filesize (KB) | Value           |
+------------+---------------+-----------------+

Apply the attached patch from the webform/components directory.

The patch was created by a colleague.