Use hildon_touch_selector_set/get_text_column() in the touchselector widgets

Use hildon_touch_selector_set/get_text_column() in the touchselector widgets

* hildon/hildon-date-selector.c:
(hildon_date_selector_construct_ui):
* hildon/hildon-time-selector.c:
(hildon_time_selector_constructor):
* hildon/hildon-touch-selector-entry.c:
(hildon_touch_selector_entry_set_text_column),
(hildon_touch_selector_entry_get_text_column):
* hildon/hildon-touch-selector.c: (_default_print_func),
(hildon_touch_selector_new_text): Use
hildon_touch_selector_set/get_text_column() instead of
setting/getting the "text-column" property.