Allow configuring frequency of email notifications

Allow configuring frequency of email notifications: This is a feature request. Currently, Docmost sends out email notifications immediately, e.g. when a user is mentioned. It would be great if a user could configure how frequently they want to get notifications, e.g. once per hour or day. We use Docmost to take notes during meetings which leads to users getting mentioned a couple times in the notes and receiving an email for each mention.