Store the "tab auto hide" state in the controller, not the view

Added a signal for the QtQuick view too

src/qtquick/views/Stack_qtquick.h

@@ -26,6 +26,8 @@
 #include <QAbstractListModel>
 #include <QVector>
 
+#include "kdbindings/signal.h"
+
 namespace KDDockWidgets {
 namespace Controllers {
 class DockWidget;
@@ -45,6 +47,7 @@ class DOCKS_EXPORT Stack_qtquick
     Q_OBJECT
     Q_PROPERTY(DockWidgetModel *dockWidgetModel READ dockWidgetModel CONSTANT)
     Q_PROPERTY(QObject *tabBar READ tabBarViewObj NOTIFY tabBarChanged)
+    Q_PROPERTY(bool tabBarAutoHide READ tabBarAutoHide NOTIFY tabBarAutoHideChanged)
 
 public:
     explicit Stack_qtquick(Controllers::Stack *controller,
@@ -68,12 +71,16 @@ public:
     /// @brief Returns the stack controller associated with this view
     Controllers::Stack *stack() const;
 
+    /// Returns whether the tab bar should hide when there's only 1 tab visible
+    /// Default true, unless Flag_HideTitleBarWhenTabsVisible
+    bool tabBarAutoHide() const;
+
 Q_SIGNALS:
     void tabBarChanged();
+    void tabBarAutoHideChanged();
 
 protected:
     bool isPositionDraggable(QPoint p) const override;
-    void setTabBarAutoHide(bool) override;
     void renameTab(int index, const QString &) override;
     void changeTabIcon(int index, const QIcon &) override;
     void init() override;
@@ -82,13 +89,15 @@ private:
     Q_DISABLE_COPY(Stack_qtquick)
     DockWidgetModel *const m_dockWidgetModel;
     Controllers::DockWidget *m_currentDockWidget = nullptr;
+    KDBindings::ScopedConnection m_tabBarAutoHideChanged;
 };
 
 class DockWidgetModel : public QAbstractListModel
 {
     Q_OBJECT
 public:
-    enum Role {
+    enum Role
+    {
         Role_Title = Qt::UserRole
     };