Use QUrls from match to create mimeData in base implementation
Summary:
QueryMatch contains a list of URLs.
If an AbstractRunner doesn't implement this method, create some mimeData
from the availalbe data in the base implementation.
Test Plan: Have a DBus runner which populates a bunch of URLs, but doesn't implement this method.
Reviewers: Plasma, broulik
Reviewed By: Plasma, broulik
Subscribers: broulik, plasma-devel, Frameworks
Tags: Plasma, Frameworks
Differential Revision: https://phabricator.kde.org/D7402