[BUGFIX] Close opened CSP report when removing all reports

Clicking the "Remove all" button in the CSP backend module now closes
any open report.

Resolves: #100757
Releases: main
Change-Id: Ie6b4b5d581c2b44385f40c9db8d3b5bcbd1b8a2a
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/78879


Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Chris Müller <typo3@krue.ml>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Chris Müller <typo3@krue.ml>