Don't ignore creation-deletion sequences

Don't ignore creation-deletion sequences

Fixes https://github.com/lxqt/pcmanfm-qt/issues/944

Previously, if a file was in addition queue and then it came into the deletion
queue, its addition and deletion were both ignored. That was wrong and could
result in showing nonexistent files because addition can also happen in
directory list job before being processed by file info job.

Also process accumulated changes only after finishing the current info job and
don't clear all deletion paths after processing them (because, logically, only
those paths that can be deleted should be removed).

Gbp-Pq: Name dont-ignore-crea-del-sequences.patch