Fixes: Mac: Buffer switcher hides the main window.

When switching from text editor in Edit mode to a visual editor in
Design mode via Opt+Tab.

Task-number: QTCREATORBUG-1665
Reviewed-by: Daniel Molkentin
(cherry picked from commit 11549acdbe)

src/plugins/coreplugin/editormanager/openeditorswindow.cpp

@@ -82,8 +82,8 @@ OpenEditorsWindow::OpenEditorsWindow(QWidget *parent) :
 
 void OpenEditorsWindow::selectAndHide()
 {
-    selectEditor(m_editorList->currentItem());
     setVisible(false);
+    selectEditor(m_editorList->currentItem());
 }
 
 void OpenEditorsWindow::setVisible(bool visible)