Description of problem:
Quite often one may want to rename or change the name of a guest.
It would be nice if virt-manager supported this.
Steps to Reproduce:
1. install a guest with incorrect name or maybe upgrade guest to newer version
2. realise name could have been better or want to change it
2. can't do anything about it easily except reinstall
2. should be able to change the name at least in virt-manager
but better on disk to desired name.
You can actually, the guest just needs to be turned off. Details->Overview. Please reopen if that causes any problems.