Change HabitInstance implementation to not contain comment in instance
Change HabitInstance implementation to not contain comment in instance

This patch changes the HabitInstance implementation so that the comment
is not expected to exist in the instance object itself.

This is done for less data duplication.

Signed-off-by: Matthias Beyer <1d6e1cf70ec6f9ab28d3ea4b27a49a77654d370e@beyermatthias.de>

matthiasbeyer/imag,matthiasbeyer/imag