Fixed startFloating() for FloatingDockContainer if only one DockArea is visble

Author: Uwe Kindler

src/DockAreaWidget.cpp

@@ -145,7 +145,8 @@ class CTabsScrollArea : public QScrollArea
 		// If this is the last dock area in a dock container it does not make
 		// sense to move it to a new floating widget and leave this one
 		// empty
-		if (m_DockArea->dockContainer()->isFloating() && m_DockArea->dockContainer()->dockAreaCount() == 1)
+		if (m_DockArea->dockContainer()->isFloating()
+		 && m_DockArea->dockContainer()->visibleDockAreaCount() == 1)
 		{
 			return;
 		}

src/DockOverlay.cpp

@@ -93,7 +93,6 @@ static QPixmap createDropIndicatorPixmap(const QPalette& pal, const QSizeF& size
 	if (CDockOverlay::ModeContainerOverlay == Mode && DockWidgetArea != CenterDockWidgetArea)
 	{
 		baseRect = areaRect;
-		areaRect = QRectF();
 	}
 
 	p.fillRect(baseRect, backgroundColor);

src/DockWidgetTitleBar.cpp

@@ -167,7 +167,7 @@ bool DockWidgetTitleBarPrivate::startFloating()
 	// then it does not make any sense, to make if floating because
 	// it is already floating
 	 if (DockWidget->dockContainer()->isFloating()
-	 && (DockWidget->dockContainer()->dockAreaCount() == 1)
+	 && (DockWidget->dockContainer()->visibleDockAreaCount() == 1)
 	 && (DockWidget->dockAreaWidget()->count() == 1))
 	{
 		return false;