[Alarms & Timers] Add new option for delete a timer after it expires

apps/alarm/app.js

@@ -280,6 +280,10 @@ function showEditTimerMenu(selectedTimer, timerIndex) {
       value: timer.on,
       onchange: v => timer.on = v
     },
+    /*LANG*/"Delete After Expiration": {
+      value: timer.del,
+      onchange: v => timer.del = v
+    },
     /*LANG*/"Vibrate": require("buzz_menu").pattern(timer.vibrate, v => timer.vibrate = v),
     /*LANG*/"Cancel": () => showMainMenu()
   };