Parent Task Custom Field; setting rules to change Custom Field when Subtasks are completed

@Phil_Seeman You could even have the trigger be X like normal today, and the action category be “Actions to Subtasks” where the actions in the category could be “Change a field in Subtask” where you make which tasks and which field you want updated.

This answering the question of how you can know which subtask that would need to be updated. Could even have a box that would allow for “apply to all subtasks”.

@Marie @Bastien_Siebman