MicRawData should handle argument else label will fail

For example

```
<iframe src="https://calendar.google.com/calendar/embed?mode=WEEK&amp;height=600&amp;wkst=1&amp;bgcolor=%23FFFFFF&amp;src=021vq166ioejihr7nsat0pjqic%40group.calendar.google.com&amp;color=%231B887A&amp;ctz=Europe%2FParis" style="border-width:0" width="800" height="600" frameborder="0" scrolling="no">
</iframe>
```

the label should be iframe else we will not be able to close them.

