A related plugin or future interface enhancement would be to allow double clicking of the paragraph to reveal an HTML Form specified by the HTML added when the plugin was configured.
Entering new value into the form would result in new content being displayed by the item. Double clicking again would bring back the form in the usual way.
To delete the form or to edit the nature of the form, the site-owner would double click twice so-to-speak. first time to bring up the form, and then the second time double-clicking on the form itself, would bring up the raw text input box - where they could delete the form HTML or supply new form HTML.