So, this has been here since the early days of the Corona MP manager.
The manager still misses many implementations for the treeview it is made of, like Ctrl+copying, rearranging multiple items, etc.
Also, multiple treeview nodes cannot be edited at once, like enumerating them via the built-in expressions like "1+num" etc.
I'd really like to see this fixed, it is stilly very annoying for everyday work. ;)
Cheers,
Robert