adds translation strings for email notification view conversation link

Author: Kneeba921

config/locales/en.yml

@@ -639,6 +639,7 @@ en:
         subject_with_title: '[%{conversation}] conversation has an unread message'
         view_conversation: 'You can view and reply to this message by clicking the
           link below:'
+        view_conversation_link: 'Go to conversation'
     conversations:
       communicator:
         active_conversations: Active Conversations

config/locales/es.yml

@@ -642,6 +642,7 @@ es:
         subject_with_title: '[%{conversation}] tiene un mensaje sin leer'
         view_conversation: 'Puedes ver y responder a este mensaje haciendo clic en
           el enlace a continuación:'
+        view_conversation_link: 'Ir a la conversación'
     conversations:
       communicator:
         active_conversations: Active Conversations

config/locales/fr.yml

@@ -644,6 +644,7 @@ fr:
         subject_with_title: '[%{conversation}] contient un message non lu'
         view_conversation: 'Vous pouvez voir et répondre à ce message en cliquant
           sur le lien ci-dessous :'
+        view_conversation_link: 'Aller à la conversation'
     conversations:
       communicator:
         active_conversations: Active Conversations