Advance Wayland and KDE package bring-up

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

local/recipes/kde/kf6-kiconthemes/source/autotests/kiconengine_scaled_unittest.cpp

@@ -0,0 +1,58 @@
+/*
+    SPDX-FileCopyrightText: 2021 Volker Krause <vkrause@kde.org>
+
+    SPDX-License-Identifier: LGPL-2.0-or-later
+*/
+
+#include <QImageReader>
+#include <QStandardPaths>
+#include <QTest>
+
+#include <KIconEngine>
+#include <KIconLoader>
+
+static int setupEnvBeforeQApplication = []() {
+    qunsetenv("QT_SCREEN_SCALE_FACTORS");
+    qputenv("QT_SCALE_FACTOR", "2.0");
+    return 1;
+}();
+
+class KIconEngine_Scaled_UnitTest : public QObject
+{
+    Q_OBJECT
+
+private Q_SLOTS:
+    void initTestCase()
+    {
+        QStandardPaths::setTestModeEnabled(true);
+    }
+
+    void testCenterIcon()
+    {
+        QIcon icon(new KIconEngine(QStringLiteral(":/test-22x22.png"), KIconLoader::global()));
+        QVERIFY(!icon.isNull());
+
+        QWindow w;
+        QCOMPARE(w.devicePixelRatio(), 2.0);
+        auto image = icon.pixmap(QSize(22, 22), w.devicePixelRatio()).toImage();
+        QCOMPARE(image.devicePixelRatio(), 2.0);
+        QCOMPARE(image.size(), QSize(44, 44));
+
+        QImageReader reader(QStringLiteral(":/test-22x22.png"));
+        reader.setScaledSize(QSize(44, 44));
+        QImage unscaled = reader.read();
+        QVERIFY(!unscaled.isNull());
+        QCOMPARE(unscaled.size(), QSize(44, 44));
+        unscaled.setDevicePixelRatio(2.0);
+        QCOMPARE(image, unscaled);
+
+        // center vertically
+        QVERIFY(icon.pixmap(QSize(22, 26), w.devicePixelRatio()).toImage().copy(0, 4, 44, 44) == image);
+        // center horizontally
+        QVERIFY(icon.pixmap(QSize(26, 22), w.devicePixelRatio()).toImage().copy(4, 0, 44, 44) == image);
+    }
+};
+
+QTEST_MAIN(KIconEngine_Scaled_UnitTest)
+
+#include "kiconengine_scaled_unittest.moc"