Fixed status on Cell class

The status property was reading the column's data which could be translated
and would not match the STATUS_CHOICES post translation.
Therefore, in any other languages the get_status_class method was always
returning "status_unknown" when in a non english locale.

Change-Id: I5194507816631f9c59656d393af4cb7bc22336f6
Closes-Bug: 1319284
Merge "Fixed status on Cell class"