[Status: Backburner ⏳] Feature Request - Time entry in sub-tasks needs to roll up to Parent Task

When we set up a project we have a custom field that contains a invoice milestone for each project task that is a client deliverable

We also estimate each resources time before the project starts so we can compare estimate vs actuals for each of the delivery tasks

Under a Task there may be several sub-tasks, but when someone enters time to a sub-task it doesn't roll up to the parent task.

This is an issue for us as we would like to compare our estimates, but the actuals will contain hours logged to sub-tasks that don't show up to the parent task.

Please let us know if this can be enabled (possibly using a check box that says, "Hours on sub-tasks roll up to parent task?"

Thanks