[BUGFIX] Prevent PHP warning in OpendocsToolbarItem

In case a record from a no longer existing
table is stored as recently opened in the
user session, a PHP warning is triggered
whenever the toolbar items are updated
(e.g. because user opens another record).

This is fixed by adding corresponding fallbacks.

Resolves: #96075
Releases: master, 11.5
Change-Id: Ia99371711f2a8ef9fa6a96844476148674b5b843
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72285


Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Oliver Bartsch <bo@cedev.de>