reviewed by: Pavel Cisler <pavel@eazel.com>

	Fixed some problems with callbacks that are left around after
	the object is destroyed.

	* src/nautilus-window-manage-views.h:
	* src/nautilus-window-manage-views.c:
	(viewed_file_changed_callback): Changed to be a normal callback,
	not a "connect_object" callback, and simplified the logic.
	(cancel_viewed_file_changed_callback): Added a function to cancel
	the callback, which is needed both when the window is destroyed
	and when the viewed file changes.
	(update_for_new_location): Cancel the old callback before setting
	up the new one so we don't leave behind callbacks for old locations.
	Also use the new nautilus_window_set_viewed_file function so the
	callbacks set up in nautilus-window.c can be managed properly.
	(free_location_change): Moved part of
	nautilus_window_free_load_info in here. This function frees all
	the stuff that's used in the location change process; shared by
	destroy and "cancel" code. Also fixed a bug where it wouldn't free
	the "error_views".
	(cancel_location_change): Moved the rest of
	nautilus_window_free_load_info in here and made this use the new
	function.
	(disconnect_view): Made this private now that the code to
	disconnect the views is inside this file.
	(disconnect_view_callback),
	(nautilus_window_manage_views_destroy): Moved the code to clean up
	from nautilus-window.c in here. Added cleanup for the location
	change fields and for the viewd_file_changed callback.

	* src/nautilus-window.c:
	(nautilus_window_destroy): Call a new function to do the
	nautilus-window-manage-views.c part of the destroy and moved some
	code in there. Cancel the view-as callback too.
	(create_view_as_menu_item),
	(replace_special_current_view_in_view_as_menu),
	(nautilus_window_synch_view_as_menu): Renamed. The words "view as
	menu" are clearer than "content view menu".
	(chose_component_callback): Got rid of code that tries to handle
	bad values for callback data. The callback must be cancelled,
	because you can't call NAUTILUS_IS_WINDOW on a freed window and
	expect it to behave predictably.
	(cancel_chose_component_callback): Function to cancel the callback,
	called at both destroy time and before adding a new one.
	(view_menu_choose_view_callback): Cancel the old callback before
	adding a new one.
	(view_menu_vfs_method_callback): Simplify logic a bit.
	(load_view_as_menu_callback): Renamed.
	(cancel_view_as_callback): Function to cancel the callback, called
	at both destroy time and before adding a new one.
	(nautilus_window_load_view_as_menu): Cancel the old callback before
	adding a new one. Also renamed.
	(nautilus_window_set_viewed_file): A new function that cancels the
	callbacks on the file object before switching to a new one.

	* libnautilus-extensions/nautilus-program-choosing.c:
	(nautilus_cancel_choose_component_for_file): Implemented missing
	cancel function, needed by new window code.

	* src/nautilus-window-private.h:
	* src/nautilus-window-menus.c:
	(bookmarks_menu_add_bookmark_callback),
	(add_bookmark_for_current_location): Made the function local to
	this file since it's both defined and used here.

	* libnautilus-extensions/nautilus-glib-extensions.c:
	* libnautilus-extensions/nautilus-volume-monitor.c:
	* libnautilus/nautilus-undo-transaction.c:
	* libnautilus/nautilus-view.c:
	* librsvg/rsvg.c:
	Added missing "static" to make some local non-"nautilus_"-prefixed
	globals be internal instead of external.

	* src/nautilus-sidebar.c: Formatting tweaks, added FIXME.

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