Show asterisk by modified filenames

Summary:
Show an asterisk (*) by the file name if its been modified . remove it if its been unmodified

Needs D13126 to work correctly

Reviewers: tcanabrava, patrickelectric, laysrodrigues

Reviewed By: patrickelectric

Subscribers: Atelier: General Development

Tags: Atelier: General Development

Differential Revision: https://phabricator.kde.org/D13129