Indented Groups

It would be great if you could indent a group. Even if this group was no different just the fact it is indented visually shows that it falls within the group above. For example we have a sales process in our boards with the following stages:

New Enquiry - Need to Contact
1 Attempt Made - No Answer
1 Attempt Made - No Answer
1 Attempt Made - No Answer
Contacted
Quoted
Won
Lost

If we could indent groups we could visually see that as:

New Enquiry - Need to Contact
— 1 Attempt Made - No Answer
— 1 Attempt Made - No Answer
— 1 Attempt Made - No Answer
Contacted
Quoted
Won
Lost

Subtle change but it helps you to see visually that the groups are not all linear.

Would be a great addition.

Thanks

Jack