Save/restore collapse state
completed by: Ignacio Rodríguez
mentors: Sugar Labs
The state of a collapsed stack (expanded/collapsed) should be saved in the project json file and restored when reloading the project.
probably something like;
[0, ['start', false], 100, 100, [1]]
or
[0, ['action', true], 100, 100, [1, 2]]
When restoring, the old format should also work, defaulting to expanded.
[0, 'start', 100, 100, [1]]
or
[0, [action', 100, 100, [1, 2]]