Disable the Mautic contact list in campaign controller for faster page rendering.

contact_list_disable.diff

diff --git a/app/bundles/CampaignBundle/Controller/CampaignController.php b/app/bundles/CampaignBundle/Controller/CampaignController.php
index 0e854506e..d03daf7d5 100644
--- a/app/bundles/CampaignBundle/Controller/CampaignController.php
+++ b/app/bundles/CampaignBundle/Controller/CampaignController.php
@@ -746,15 +746,18 @@ class CampaignController extends AbstractStandardFormController
                         'dateRangeForm'   => $dateRangeForm->createView(),
                         'campaignSources' => $this->campaignSources,
                         'campaignEvents'  => $events,
-                        'campaignLeads'   => $this->forward(
-                            'MauticCampaignBundle:Campaign:contacts',
-                            [
-                                'objectId'   => $entity->getId(),
-                                'page'       => $this->get('session')->get('mautic.campaign.contact.page', 1),
-                                'ignoreAjax' => true,
-                            ]
-                        )->getContent(),
+                        // Temporary hack to overcome contact overflow on some campaigns.
+                        'campaignLeads'   => 'Go <a href="/s/campaigns/view/'.$entity->getId().
+                            '/contact/1" target="_blank">here</a> to see the contact list.',
+                        // $this->forward(
+                        //     'MauticCampaignBundle:Campaign:contacts',
+                        //     [
+                        //         'objectId'   => $entity->getId(),
+                        //         'page'       => $this->get('session')->get('mautic.campaign.contact.page', 1),
+                        //         'ignoreAjax' => true,
+                        //     ]
+                        // )->getContent(),
                         'tabDataMode'     => $tabDataMode,
                     ]
                 );
                 break;