Introduce convenience property "GtkWidget:tooltip-text" taking care of

Introduce convenience property "GtkWidget:tooltip-text" taking care of

2007-06-15 Mathias Hasselmann <mathias.hasselmann@gmx.de>

        * docs/reference/gtk/gtk-sections.txt, gtk/gtk.symbols,
        gtk/gtkwidget.c, gtk/gtkwidget.h, tests/testtooltips.c: Introduce
        convenience property "GtkWidget:tooltip-text" taking care of escaping
        it for unwanted markup entities. Add functions to set tooltip text:
        gtk_widget_set_tooltip_text(), gtk_widget_set_tooltip_markup(),
        gtk_widget_get_tooltip_text(), gtk_widget_get_tooltip_markup().

        * gtk/gtktooltip.c, gtk/gtktooltip.h: Add gtk_tooltip_set_text()
        to set the tooltip text without using markup.

        Patches from Emmanuele Bassi (#447643).

svn path=/trunk/; revision=18142