[BUGFIX] Scan extension by clicking panel

The extension scanner now scans an extension by opening its
panel again.

Resolves: #85440
Releases: master
Change-Id: I7b72f8c658d200c5c4d4ca90f7d6b55828c33efd
Reviewed-on: https://review.typo3.org/57493


Reviewed-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Tested-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Reviewed-by: Jürgen Venne <venne@schaffrath-digital.de>
Tested-by: Jürgen Venne <venne@schaffrath-digital.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>