Revert "MenuBar: Tweak string for open user folder option"

This reverts commit 6788bda.

The user folder can be either global or local. If it is local,
we shouldn't call it global.

See also da0be24.

Source/Core/DolphinQt/MenuBar.cpp

@@ -217,7 +217,7 @@ void MenuBar::AddFileMenu()
   file_menu->addSeparator();
 
   m_open_user_folder =
-      file_menu->addAction(tr("Open Global &User Directory"), this, &MenuBar::OpenUserFolder);
+      file_menu->addAction(tr("Open &User Folder"), this, &MenuBar::OpenUserFolder);
 
   file_menu->addSeparator();