(stable) When cancelling an edit of an inline with content, don't hide the inline

Summary: See PHI1753. This condition got rewritten for suggested edits and accidentally inverted.

Test Plan:

• Create a comment, type text, save draft, edit comment, cancel.
• Before: comment hides itself.
• After: comment properly cancels into pre-edit draft state.

Differential Revision: https://secure.phabricator.com/D21286