Replace all qWarning and related calls with categorised logging
Summary:
This replaces all uncategorised qWarning() calls with calls to qCWarning(), using the
kf5.ki18n category for the main warnings, with kf5.ki18n.kuit used for warnings
produced by the kuit code.
Test Plan: Tests still pass, warnings printed by ki18n during tests now use categorised logging.
Reviewers: apol
Reviewed By: apol
Subscribers: kde-frameworks-devel
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D24630