Preparation of merge with master

client/src/campaigns/CUD.js

@@ -188,6 +188,8 @@ export default class CUD extends Component {
                 click_tracking_disabled: false,
                 open_trackings_disabled: false,
 
+                unsubscribe_url: '',
+
                 source: CampaignSource.TEMPLATE,
 
                 // This is for CampaignSource.TEMPLATE and CampaignSource.CUSTOM_FROM_TEMPLATE
@@ -531,6 +533,8 @@ export default class CUD extends Component {
 
                     {sendSettings}
 
+                    <InputField id="unsubscribe_url" label={t('Custom unsubscribe URL')}/>
+
                     <hr/>
 
                     <CheckBox id="open_trackings_disabled" text={t('Disable opened tracking')}/>