MM-20347 Move ID Loaded Push Notifications to E20 (#13185)

* Move ID Loaded Push Notifications to E20

* Fix model tests

app/notification_email.go

@@ -19,8 +19,8 @@ import (
 )
 
 func (a *App) sendNotificationEmail(notification *PostNotification, user *model.User, team *model.Team) *model.AppError {
-	channel := notification.channel
-	post := notification.post
+	channel := notification.Channel
+	post := notification.Post
 
 	if channel.IsGroupOrDirect() {
 		teams, err := a.Srv.Store.Team().GetTeamsByUserId(user.Id)