[BUGFIX] Fix thrown \InvalidArgumentException in access module

The returnUrl is not available if the access module is accessed via
context menu of the page tree. The module now checks whether the
returnUrl is available and renders the close button only in such case.

Resolves: #83053
Releases: master, 8.7
Change-Id: I37c5c65c1505b42acf7ac734fbc7a9f53629a6a1
Reviewed-on: https://review.typo3.org/54713


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Riccardo De Contardi <erredeco@gmail.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>