May I suggest a different 'Copy' behavior.
Instead of asking for new name, just open a properties window with new name in it and all parameters copied from the original.
That would allow to make copy AND modify new parameters somewhat faster (less clicks ;)
Asking for name for the new tunnel is redundant as well (if you validate properties window)...
I guess, I really hate this tiny 'Name for new Tunnel:' window... =)