[BUGFIX] Fix deleting file from context menu

Since context menu refactoring the file deletion
did not work.
This patch fixes the issue, by adding missing line in JS.

Resolves: #79916
Releases: master
Change-Id: I939f153aa1d5eae22f821ede98329774e63a3757
Reviewed-on: https://review.typo3.org/51768


Reviewed-by: Malte Koitka <malte@cytrus.de>
Tested-by: Malte Koitka <malte@cytrus.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>