KUiServerV2JobTracker: prevent a crash
This is a very-common crash, happening when plasma crashes itself: https://crash-reports.kde.org/organizations/kde/issues/10390/activity/?project=4&query=is%3Aunresolved&referrer=issue-stream&stream_index=0
I think this is due to the line 204 indeed, dereferencing a jobViews key, which is nullptr, because the QTimer::timeout callback in KUiServerV2JobTracker::registerJob did implicitely insert a jobViews[nullptr] when the job was already removed. Guard with jobGuard.
The first change is not necessary but I felt it makes the code implicit, otherwise we have a QPointer implicit conversion to *.
TBD, squash the merge requests and add proper commit message.
cc @broulik