Sets the title of a toplevel window, to be displayed in the titlebar.
If you haven’t explicitly set the icon name for the window
(using gdk_window_set_icon_name()), the icon name will be set to
@title as well. @title must be in UTF-8 encoding (as with all
user-readable strings in GDK/GTK+). @title may not be %NULL.
Sets the title of a toplevel window, to be displayed in the titlebar. If you haven’t explicitly set the icon name for the window (using gdk_window_set_icon_name()), the icon name will be set to @title as well. @title must be in UTF-8 encoding (as with all user-readable strings in GDK/GTK+). @title may not be %NULL.