Habit Tracker: Goals & To-do's

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- Show a snackbar when a habit is skipped/completed along with an undo option

- Show 2 columns instead of 1 for tablets or large phones in landscape orientation

- Updated the habit cards to show "Today", "Yesterday", "Tomorrow", "In X days" instead of the time remaining

- Fix crash when sometimes clicking for a habit's details

- Fix bug where the widget wouldn't update when a habit has been completed/skipped for today

- Fix bug where notifications weren't displaying overdue habits