Components: setting textContent property probably needs a cast to string

[verpeteren]

I'am experimenting with the components branch (6418e6c) and found this minor issue.

<application>

<meta>
	<viewport>100x100</viewport> 
</meta> 
<layout>
	<button id="ro"></button>
</layout>

<script>
	document.getElementById("ro").textContent = 4;
</script>

</application>

This gives:

/src/Embed/framework/elements/textnode.js:68:1 TypeError: textValue.trim is not a function