Update permalink error message (#3427)

* Clarify permalink error message

* Clarify permalink error message en.json

* Update global_actions.jsx

* Update en.json

webapp/actions/global_actions.jsx

@@ -155,7 +155,7 @@ export function emitPostFocusEvent(postId) {
             doFocusPost(channelId, postId, data);
         },
         () => {
-            browserHistory.push('/error?message=' + encodeURIComponent(Utils.localizeMessage('permalink.error.access', 'Permalink belongs to a channel you do not have access to')));
+            browserHistory.push('/error?message=' + encodeURIComponent(Utils.localizeMessage('permalink.error.access', 'Permalink belongs to a deleted message or to a channel to which you do not have access.')));
         }
     );
 }

webapp/i18n/en.json

@@ -1113,7 +1113,7 @@
   "password_send.title": "Password Reset",
   "pending_post_actions.cancel": "Cancel",
   "pending_post_actions.retry": "Retry",
-  "permalink.error.access": "Permalink belongs to a channel you do not have access to",
+  "permalink.error.access": "Permalink belongs to a deleted message or to a channel to which you do not have access.",
   "post_attachment.collapse": "Show less...",
   "post_attachment.more": "Show more...",
   "post_body.commentedOn": "Commented on {name}{apostrophe} message: ",