Fix side tab widget ordering

Now is fixed based on the side tab widget

src/DockContainerWidget.cpp

@@ -899,14 +899,19 @@ void DockContainerWidgetPrivate::saveChildNodesState(QXmlStreamWriter& s, QWidge
 
 void DockContainerWidgetPrivate::saveOverlayWidgetsState(QXmlStreamWriter& Stream)
 {
-    for (const auto dockAreaWidget : _this->findChildren<CDockAreaWidget*>())
+    for (const auto sideTabBar : SideTabBarWidgets.values())
     {
-        if (!dockAreaWidget->isOverlayed())
+		for (auto itemIndex = 0; itemIndex < sideTabBar->tabCount(); itemIndex++)
+		{
+			const auto sideTab = sideTabBar->tabAt(itemIndex);
+            if (sideTab == nullptr)
             {
 				continue;
             }
 
-        dockAreaWidget->saveState(Stream);
+			const auto dockArea = sideTab->dockWidget()->dockAreaWidget();
+            dockArea->saveState(Stream);
+		}
     }
 }
 
@@ -1096,7 +1101,7 @@ bool DockContainerWidgetPrivate::restoreOverlayDockArea(CDockingStateReader& s,
 		DockWidget->setClosedState(Closed);
 		DockWidget->setProperty(internal::ClosedProperty, Closed);
 		DockWidget->setProperty(internal::DirtyProperty, false);
-        _this->sideTabBar(area)->insertSideTab(0, DockWidget->sideTabWidget());
+        _this->sideTabBar(area)->insertSideTab(-1, DockWidget->sideTabWidget());
         DockArea->overlayDockContainer()->addDockWidget(DockWidget);
         DockWidget->sideTabWidget()->updateStyle(); // Needed as the side tab widget get it's left/right property from the overlay dock container which was just added
 		DockArea->overlayDockContainer()->toggleView(!Closed);

src/DockWidgetSideTab.cpp

@@ -314,6 +314,13 @@ void CDockWidgetSideTab::updateOrientationAndSpacing(SideTabBarArea area)
 	d->TitleLabel->show();
 }
 
+
+//============================================================================
+CDockWidget* CDockWidgetSideTab::dockWidget() const
+{
+	return d->DockWidget;
+}
+
 /**
  * Private data class of SideTabIcon class (pimpl)
  */

src/DockWidgetSideTab.h

@@ -136,6 +136,12 @@ public:
 	 */
 	void updateOrientationAndSpacing(SideTabBarArea area);
 
+
+	/**
+	 * returns the dock widget this belongs to
+	 */
+	CDockWidget* dockWidget() const;
+
 Q_SIGNALS:
 	void elidedChanged(bool elided);
 	void clicked();

src/SideTabBar.cpp

@@ -123,4 +123,18 @@ Qt::Orientation CSideTabBar::orientation() const
 {
     return d->Orientation;
 }
+
+
+//============================================================================
+CDockWidgetSideTab* CSideTabBar::tabAt(int index) const
+{
+    return qobject_cast<CDockWidgetSideTab*>(d->TabsLayout->itemAt(index)->widget());
+}
+
+
+//============================================================================
+int CSideTabBar::tabCount() const
+{
+    return d->TabsLayout->count();
+}
 }

src/SideTabBar.h

@@ -84,6 +84,16 @@ public:
 	 */
 	Qt::Orientation orientation() const;
 
+	/*
+	 * get the side tab widget at position, returns nullptr if it's out of bounds
+	 */
+	CDockWidgetSideTab* tabAt(int index) const;
+
+	/*
+	 * Gets the count of the tab widgets
+	 */
+	int tabCount() const;
+
 	Q_SIGNALS:
 		void sideTabAutoHideToggleRequested();
 };