Unpin all nodes

The idea is:

Similar to the trash icon to dump all the data in a manually run workflow, it would be great to have one button to unpin all nodes in a workflow

My use case:

When I’m testing complicated workflows I end up pinning a lot of nodes so I have test data; at a certain point I always need to run the workflow fresh and end up needing to open all the nodes to unpin the data one by one.
It would be great to have one button to unpin everything - or perhaps some way to reset the workflow completely (so dumping all data + pins).