Merge pull request #351 from triplus/AppearanceDock

Make appearance widget dockable

src/Gui/DlgDisplayPropertiesImp.cpp

@@ -89,7 +89,6 @@ DlgDisplayPropertiesImp::DlgDisplayPropertiesImp( QWidget* parent, Qt::WindowFla
     Gui::DockWindowManager* pDockMgr = Gui::DockWindowManager::instance();
     QDockWidget* dw = pDockMgr->addDockWindow("Display properties", this, Qt::AllDockWidgetAreas);
     dw->setFeatures(QDockWidget::DockWidgetMovable|QDockWidget::DockWidgetFloatable);
-    dw->setAllowedAreas(Qt::DockWidgetAreas());
     dw->setFloating(true);
     dw->show();