Provide support for highlighting crashed threads
Summary: This diff is related to D785. Also, I've provided "BUG" keyword in that diff, so I'm omitting it here.
Test Plan: same as in D785
Reviewers: kfunk
Reviewed By: kfunk
Subscribers: mwolff, KDevelop, kdevelop-devel
Differential Revision: https://phabricator.kde.org/D786