                     label: t 'compose cc'
                     placeholder: t 'compose cc help'
                     ref: 'cc'
+                    key: 'cc-' + prefixKey
 
                 MailsInput
                     id: 'compose-bcc'

                        editable: true
                        valueLink: @linkState 'attachments'
                        ref: 'attachments'

                ComposeToolbox
                    send      : @sendMessage

                        settings          : @props.settings
                        onSend            : @sendMessage
                        composeInHTML     : @state.composeInHTML
                        getPicker         : @getPicker
                        useIntents        : @props.useIntents
                        ref               : 'editor'
                        key               : 'editor-' + prefixKey

                div className: 'attachements',
                    FilePicker
