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-kwidgetsaddons/source/src/kviewstatemaintainerbase.h

@@ -0,0 +1,43 @@
+/*
+    SPDX-FileCopyrightText: 2010 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.net>
+    SPDX-FileContributor: Stephen Kelly <stephen@kdab.com>
+
+    SPDX-License-Identifier: LGPL-2.0-or-later
+*/
+
+#ifndef KVIEWSTATEMAINTAINERBASE_H
+#define KVIEWSTATEMAINTAINERBASE_H
+
+#include "kwidgetsaddons_export.h"
+
+#include <QObject>
+
+#include <memory>
+
+class QItemSelectionModel;
+class QAbstractItemView;
+
+class KViewStateMaintainerBasePrivate;
+
+class KWIDGETSADDONS_EXPORT KViewStateMaintainerBase : public QObject
+{
+    Q_OBJECT
+public:
+    KViewStateMaintainerBase(QObject *parent = nullptr);
+    ~KViewStateMaintainerBase() override;
+
+    void setSelectionModel(QItemSelectionModel *selectionModel);
+    QItemSelectionModel *selectionModel() const;
+
+    void setView(QAbstractItemView *view);
+    QAbstractItemView *view() const;
+
+    virtual void saveState() = 0;
+    virtual void restoreState() = 0;
+
+private:
+    Q_DECLARE_PRIVATE(KViewStateMaintainerBase)
+    std::unique_ptr<KViewStateMaintainerBasePrivate> const d_ptr;
+};
+
+#endif