[BUGFIX] 404 error after closing edit wizard

[BUGFIX] 404 error after closing edit wizard

The returnUrl parameter was double encoded around getModuleUrl.
Now it's encoded only one time.

Resolves: #67473
Releases: master
Change-Id: I59345018f61717abbd6cfea02891c28441158b61
Reviewed-on: http://review.typo3.org/40287
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Daniel Maier <dani-maier@gmx.de>
Tested-by: Daniel Maier <dani-maier@gmx.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>