Checklists for card steps now have their own tab on the card, located after the Steps tab.
The current step's checklist is displayed there right away; turn off the Current step only toggle on the right to view the other steps' checklists.
Depending on its template configuration, a checklist can now receive a comment in its header, and each row can be commented on in a comment thread.
Items can also be divided into groups. Groups are defined in the list's template.
The General tab now only shows the instructions: the configuration that used to open it on the checklist has been adapted and now opens the card directly on the Checklist tab when the current step has one.