Fix crash while entering selection mode with Qt6.7
`deleteLater()` on a non-existing object seems to cause a crash with
Qt6.7. This makes some sense but wasn't the case previously.
I didn't test this yet but it is a harmless change so if anyone can confirm we can IMO merge directly.
This was brought up in https://invent.kde.org/system/dolphin/-/merge_requests/764#note_920935, reported in the bug linked below, and the sentry crash reporting page also has a few dozen reports (https://crash-reports.kde.org/organizations/kde/issues/13589/?project=4&query=is%3Aunresolved&referrer=issue-stream&stream_index=1).
Dolphin 24.02 is also affected but we are already past the last bug fix release for it.
projects / dolphin.git / commit