KateStatusBar: Show lock icon on modified label when in read-only mode
This may not needed because the information is already shown as part of the
inputMode label, on the other hand is that information there somehow misplaced.
You see the little lock bottom left?
Reviewers: KTextEditor, cullmann
Reviewed By: KTextEditor, cullmann
Subscribers: ngraham, cullmann, kwrite-devel, kde-frameworks-devel, KTextEditor
Differential Revision: https://phabricator.kde.org/D19512