Set "text-column" in _append_text_column() instead of _new_text()
Set "text-column" in _append_text_column() instead of _new_text()

In HildonTouchSelector, this makes "text-column" also work for uses of
_append_text_column() instead of only for _new_text().

Cordia/libhildon,android-808/libhildon,android-808/libhildon,android-808/libhildon,Cordia/libhildon,Cordia/libhildon