Refactor, prep for showing toas on add habit
Finally figured out simpler way to handle duesson|overdue|canbemarked
More notes to self
Throwing out old unit tests, I think
Prep for habit test cases, make damn sure I got things right
Overdue predicate seems to be working
Only time till due & cleanup left. Cut out duesoon stuff for now.
New remaining calculations in
Improved rendering of habits, updated fixture