Button improvements

At Zultar's request, these changes:

* Add spacing between the save and ready buttons (to improve the mobile experience)
* Add confirmations to votes
* Add different confirmations when cancelling votes
* Add confirmations when muting a player

Additionally, Italian translations are provided for the new messages (thanks to Chiara Tonini).

The changes were tested manually on my install. Everything works fine, except:

* I couldn't get the lookup_examples to parse correctly in the admin locale interface - ("Undefined variable: error_context") I suspect that this is because of an unrelated issue.