* libnautilus-extensions/nautilus-icon-container.c,
* libnautilus-extensions/nautilus-icon-container.h:
(destroy), (nautilus_icon_container_initialize),
(nautilus_icon_container_new),
(nautilus_icon_container_set_label_font_for_zoom_level),
(nautilus_icon_container_set_single_click_mode):
Implement missing set_single_click_mode function.

Its up to users of this widget to setup click policy and other
attributes. We shouldnt peek/poke nautilus specific preferences
in the icon container widget.

* libnautilus-extensions/nautilus-list.c:
* libnautilus-extensions/nautilus-list.h,
(nautilus_list_set_single_click_mode), (nautilus_list_initialize),
(nautilus_list_destroy), (nautilus_list_clear):
Implement missing set_single_click_mode function.

Its up to users of this widget to setup click policy and other
attributes. We shouldnt peek/poke nautilus specific preferences
in the list widget.

* src/file-manager/fm-icon-view.c: (fm_icon_view_destroy),
(text_attribute_names_changed_callback),
(click_policy_changed_callback),
(anti_aliased_mode_changed_callback), (fm_icon_view_initialize),
(fm_icon_view_update_click_mode),
(fm_icon_view_update_anti_aliased_mode), (create_icon_container):
Keep track of changes in preferences that affect the icon
container and update it when needed.

* src/file-manager/fm-list-view.c: (fm_list_view_initialize_class),
(fm_list_view_initialize), (fm_list_view_destroy), (create_list),
(update_icons), (fm_list_view_update_click_mode),
(click_policy_changed_callback):
Keep track of changes in preferences that affect the list and
update it when needed.