Breaks Brackets and prevents saving when iframe present in HTML

[tomarrell]

Was adding a Google Maps iframe within a page, then went into the CSS to scrub a value. With Live Preview, the scrub would not work and continuously produce a long string of numbers. Once initiated the scrub, Brackets would behave strangely with not registering saves of the file.

Have not tested with any more than the Google Maps iframe.

• Removing the iframe source from the html fixes the issue instantly