Modelines: fix end of comment
Summary: Use fallthroughContext to finish Modeline. This allows you to finish the comment block correctly if the Modeline is incomplete.
Reviewers: Framework: Syntax Highlighting, dhaumann, cullmann
Reviewed By: Framework: Syntax Highlighting, dhaumann
Subscribers: kwrite-devel, kde-frameworks-devel
Tags: Kate, Frameworks
Differential Revision: https://phabricator.kde.org/D24981