notifications: Correctly display the file in jobs
Summary:
For url with parameter like audiocd:/1.wav?device=/dev/sr0, the filename
displayed in notifications applet is not correct ("sr0") instead of 1.wav.
This commit try to remove the query string before extract the last path
component.
Test Plan: Manually with audiocd-kio
Reviewers: mart, davidedmundson
Reviewed By: davidedmundson
Subscribers: davidedmundson, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D4879