Add generic missed notification

This can be used e.g. by the shell for general purpose notifictions
but also for in app notifications of the foreground app.

Event-naming-spec-0.0.0.md

@@ -62,6 +62,7 @@ applications which will use the Feedback Theme Specification.
 - message-new-email:  The event used when a new email is received.
 - message-missed-email: The event used when an email  was received but not seen by the user.
 - message-missed-instant: The event used when a instant message was received but not seen by the user.
+- message-missed-notification: The event used when a notification was shown but not seen by the user.
 - message-missed-sms: The event used when a sms message was received but not seen by the user.
 - phone-incoming-call: This Event is used when a phone/voip call is coming in.
 - phone-missed-call: This Event is used when a phone/voip call is was incoming but not answered.

data/default.json

@@ -156,6 +156,12 @@
           "color"      : "blue",
           "frequency"  : 1000
         },
+        {
+          "event-name" : "message-missed-notification",
+          "type"       : "Led",
+          "color"      : "blue",
+          "frequency"  : 500
+        },
         {
           "event-name" : "message-missed-sms",
           "type"       : "Led",