Summary:
The handler allows to easily integrate file sharing into various file managers. Make it appear nicer by removing the scheme and using a different wording when sending
files

Test Plan: {F6382616}

Reviewers: #kde_connect, apol

Reviewed By: #kde_connect, apol

Subscribers: apol, kdeconnect

Tags: #kde_connect

Differential Revision: https://phabricator.kde.org/D16605