* gtk/gtkbutton.c: Revert changes to GTK_RUN_LAST.
        Unfortunately, people apparently erroneously connect
        to ::clicked for GtkToggleButton and expect
        they know what happened in the default signal handler
        instead of appropriately connecting to notification
        signal ::toggled. When the revolution comes, such
        people will be first against the wall.

        We'll just have to go back to the old less-reliable
        set-it-back hacks for handling model-view toggle
        buttons and entries. :-(.