[Remote ioslave] Add Display Name to remote:/

Summary:
BUG: 414345
FIXED-IN: 5.65

Test Plan: {F7776338}

Reviewers: broulik, ngraham, #frameworks

Reviewed By: ngraham

Subscribers: kde-frameworks-devel

Tags: #frameworks

Differential Revision: https://phabricator.kde.org/D25436