If commenting out is all that is required to workaround this can't save and continue issue, then you can do that yourself with a simple Find/Replace (and a group in the beta - one to comment it, one to uncomment), e.g.
Replace: <!-- <body>
Run replace in all html files.
And the reverse is left as an exercise for the reader
Its not super robust, but its a start. And it doesn't help if you've mangled something in the header. Maybe a good default example.