Allison Karlitskaya authored Apr 28, 2014 and Matthias Clasen committed Apr 28, 2014

We have some API in GtkMenuTracker and GtkMenuTrackerItem that is
specifically designed to deal with submenus.

Generalise these APIs to take a 'link_name' parameter that we always
give as G_MENU_SUBMENU for now.  In the future, this will allow creating
trackers for other types of links, such as sections.