[BUGFIX] Fixed return URL in reports module

Added urlencode to the returnUrl in the getAdminAccountStatus method.

Resolves: #43417
Releases: 6.2
Change-Id: I4e5d114dfcf2a71d94de25c40be8214b247843ab
Reviewed-on: https://review.typo3.org/21984
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Tim Lochmüller
Tested-by: Tim Lochmüller
Reviewed-by: Felix Kopp
Tested-by: Felix Kopp