I migrated from the ISY994 to Eisy and i'm working on the fall-out of this migration. One issues is wrt PG3 - The nodes in PG3 are listed as "unmanaged" - I was able to resolve some of this by re-installing them from the new Node Store - but others I simply want to delete - but I'm unable to find a way to do this from the GUI. What's the process for this?