sched/clkinfo: reset `last` when activating an alarm

```json
{
  "t": 23940000,
  "del": false,
  "on": true,
  "rp": false,
  "as": false,
  "dow": 127,
  "last": 23,
  "vibrate": "::",
  "msg": ""
}
```

apps/sched/ChangeLog

@@ -29,3 +29,4 @@
 0.26: Fix hitting snooze on an alarm after when the snooze would've fired
 0.27: Tapping clkinfo enables/disables the selected alarm
 0.28: Added an icon for disabled events
+0.29: Fix possible bug in toggling an alarm to on, from clkinfo

apps/sched/clkinfo.js

@@ -135,6 +135,7 @@
         run: function() {
           if (a.date) return; // ignore events
           a.on = !a.on;
+          a.last = 0;
           if(a.on && a.timer) alarm.resetTimer(a);
           this.emit("redraw");
           alarm.setAlarms(all);

apps/sched/metadata.json

@@ -1,7 +1,7 @@
 {
   "id": "sched",
   "name": "Scheduler",
-  "version": "0.28",
+  "version": "0.29",
   "description": "Scheduling library for alarms and timers",
   "icon": "app.png",
   "type": "scheduler",