Prevent rendering of the element when it has no content.
The purpose of this tag helper is for Nucleus layouts. Some layouts have many Panes which present content in various ways, of which only a few are used on any given page. By adding a suppress-empty="true" attribute to the element which wraps the Pane, the element can be completely suppressed when not in use. This tag helper operates on any HTML element with a suppress-empty attribute with a value of true.