I Like Mike Phillips' requested feature of "Ability to Clear Text in the Preview Window" for all of the reasons that he points out.

Could the same result be achieved if the current "CLEAR" button was not greyed out but remained available for selection at all times?
It would only activate when appropriate.

I would have added this as a comment on the feature itself with my "Like" but was unable to.
Perhaps selecting the "Like" link on new features could also offer a box for possible comments.
No Like - No comment!