Currently you have this actions on notification :
- Click = open message in app
- Swipe = let message unread
- "Reply" action = customizable answer action

It would be great to add two action buttons :
- "Call" action = open the dialer with the phone number of the emitter OR dial directly the emitter (customizable ?)
- "Mark as read" action = Mark this message as read in the message list.

The latter one is especially convenient when you are waiting for a simple answer to a previous message.