Multiple cross-team functionality fixes (#2902)

webapp/stores/notification_store.jsx

@@ -43,7 +43,7 @@ class NotificationStoreClass extends EventEmitter {
 
             if (notifyLevel === 'none') {
                 return;
-            } else if (notifyLevel === 'mention' && mentions.indexOf(user.id) === -1 && channel.type !== Constants.DM_CHANNEL) {
+            } else if (notifyLevel === 'mention' && mentions.indexOf(user.id) === -1 && msgProps.channel_type !== Constants.DM_CHANNEL) {
                 return;
             }
 

webapp/stores/user_store.jsx

@@ -111,7 +111,7 @@ class UserStoreClass extends EventEmitter {
     }
 
     hasProfile(userId) {
-        return this.getProfiles()[userId] != null;
+        return this.getProfile(userId) != null;
     }
 
     getProfile(userId) {