Split out from issue2550648 (Should be possible to search for matching 
several keywords (keyword1 AND keyword2) especially from
msg4302:

|The KeywordEditor module attempts to inject HTML by means of 
the "innerHTML" DOM attribute. However, that only works with HTML 4, 
but not XHTML. Since otherwise Roundup isn't tied to HTML 4 (in fact, 
it has a config value to set whether XHTML should be generated), I 
think this needs to be fixed, too.

Well to fix the issue with the dissapearing edit link after using
the expression editor, I am adding outerHTML to fix it.

I assume that is not supported to manipulate the dom in XHTML either.

I guess that begs the question, do we just want to dump xhtml and go
with straight html 5?