Undo action should undo the helix offset changes when strands are moved or created outside the boundaries of helices when 'dynamically update helices' option is checked

[abhishekgokhale]

While having the 'dynamically update helices' option checked, moving or creating strands as shown (outside the helix boundaries) does not undo the helix offset changes.

Original strand:

Moved strand:

After undo: