[BUGFIX] Wrong type label in direct mail listing

If there is a draft record among the listed direct mails in the first
step of the Direct Mail module it will always show "EXT URL" for
drafts, no matter whether they are drafts of external url or drafts of
internal pages.

Change-Id: Ic8e888d576ce8a305830c6a88453d2418e0e51ae
Resolves: #52458
Releases: 3.x
Reviewed-on: https://review.typo3.org/24249
Reviewed-by: Bernhard Kraft
Tested-by: Bernhard Kraft