[commhistory-daemon] Suppress previews for update notifications. JB#5…

…0448

Notification previews are now shown by default, so explicitly
disable them if required for existing behavior.

src/notificationgroup.cpp

@@ -158,6 +158,8 @@ void NotificationGroup::updateGroup()
         // group header ('missed calls' or 'new voicemails').
         mGroup->setBody(body);
     }
+    mGroup->clearPreviewSummary();
+    mGroup->clearPreviewBody();
     mGroup->setItemCount(mNotifications.size());
 
     // This group is only visible if the members are hidden

src/personalnotification.cpp

@@ -128,6 +128,8 @@ void PersonalNotification::publishNotification()
     m_notification->setHintValue("x-nemo-hidden", m_hidden);
     m_notification->setSummary(name);
     m_notification->setBody(notificationText());
+    m_notification->clearPreviewSummary();
+    m_notification->clearPreviewBody();
 
     NotificationManager::instance()->setNotificationProperties(m_notification, this, false);