Description of problem:
After upgrade virt-manager 1.4.1-1.fc25 on fedora 25 if I try to open a the console of any existent VM I receive an error 

Errore nell'avvio dei dettagli: 'nome-mv'

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/engine.py", line 820, in _show_vm_helper
    details = self._get_details_dialog(uri, vm.get_connkey())
  File "/usr/share/virt-manager/virtManager/engine.py", line 797, in _get_details_dialog
    obj = vmmDetails(conn.get_vm(connkey))
  File "/usr/share/virt-manager/virtManager/details.py", line 395, in __init__
    self.console = vmmConsolePages(self.vm, self.builder, self.topwin)
  File "/usr/share/virt-manager/virtManager/console.py", line 128, in __init__
    self._change_title()
  File "/usr/share/virt-manager/virtManager/console.py", line 291, in _change_title
    "connection-name": self.vm.conn.get_pretty_desc(),
KeyError: 'nome-mv'


Version-Release number of selected component (if applicable):
virt-manager-1.4.1-1.fc25.noarch
virt-manager-common-1.4.1-1.fc25.noarch


How reproducible:
Open details/console of any VM, powered on or off


Steps to Reproduce:
1. Start Virt Manager
2. Create new vm
3. after wizard try to start vm 

Actual results:

Errore nell'avvio dei dettagli: 'nome-mv'

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/engine.py", line 820, in _show_vm_helper
    details = self._get_details_dialog(uri, vm.get_connkey())
  File "/usr/share/virt-manager/virtManager/engine.py", line 797, in _get_details_dialog
    obj = vmmDetails(conn.get_vm(connkey))
  File "/usr/share/virt-manager/virtManager/details.py", line 395, in __init__
    self.console = vmmConsolePages(self.vm, self.builder, self.topwin)
  File "/usr/share/virt-manager/virtManager/console.py", line 128, in __init__
    self._change_title()
  File "/usr/share/virt-manager/virtManager/console.py", line 291, in _change_title
    "connection-name": self.vm.conn.get_pretty_desc(),
KeyError: 'nome-mv'


Expected results:

Open VM details as usual


Additional info:

Workaround: rename /usr/share/locale/it/LC_MESSAGES/virt-manager.mo and restart virt-manager