embedded comments cause wyswyg editing confusion

<p>This is something<br />
<!-- this causes confusion -->
I want to edit this to be a separate paragraph</p>

If you edit this on the main screen the behaviour of the delete button
is unexpected because Amaya reacts to the presence of the comment, but
the person editing can't see the offending comment and only sees the odd
behaviour of the delete button.

I was trying to separate two adjacent lines when I got stuck on this and
yes I know comments in the middle of paragraphs is silly :-)