Based on discussion here: https://joaoapps.helprace.com/i201-separate-option-for-dismissing-sms-messages-in-chrome-extension
Chrome notifications have a two button limit. To get around this, one of the buttons can launch a popup that has more than 2 buttons.
How this should work:
Second button is always dismiss (on computer and device)
First button is:
1) not there if no actions for notification
2) if the notification has 1 action, just offer it
3) if more than 1 action for notification, make into comma-separated, multi-action button that brings up another window with all the actions
The "x" on the notifcation can be used to dismiss only on the computer, leaving the notification on the device.