Remove the ids

[shama]

When a parent renders, the context to a child element is lost. So when that child element needs to .update(), it must re-find itself in the DOM. This is why we currently require an id attribute.

It shouldn't be necessary though. There might be a way with morphdom or diffhtml to know when a child we previously created has been changed then reconnect that element on .update(). Or use another method to discover when a child has lost it's way that doesn't involve attributes and DOM lookups.

At the very least, we can detect whether or not a child requires a lookup if (element.parentNode == null) before falling to the current system.