share plugin: path display

Summary: The path displayed in the configuration of the share plugin is wrongly url-encoded on load (and default). This leads to %1 being displayed as %251. Consistently using the text property of kurlrequester fixes this issue.

Test Plan: manual inspection

Reviewers: KDE Connect, albertvaka

Reviewed By: KDE Connect, albertvaka

Subscribers: albertvaka

Differential Revision: https://phabricator.kde.org/D7963