Fix crash deep inside VcsOverlayProxyModel::data()
Summary:
VcsOverlayProxyModel::data() calls ProjectController::changesModel()
which currently is a non-const method which might create an instance
of ProjectChangesModel which in turn triggers some KJobs.
Avoid that by instantiating ProjectChangesModel() immediately during
startup. I don't think that has a real performance impact.
BUG: 384162
FIXED-IN: 5.2.1
Reviewers: apol
Reviewed By: apol
Subscribers: mwolff, dfaure, brauch, apol, kdevelop-devel
Differential Revision: https://phabricator.kde.org/D8852