It is unnecessary to allow HTML to be added to the drop zone label text,
as this content is hidden and only accessible to screen readers.
Additionally, the content is currently not properly formatted, which
introduces a risk for potential XSS exploits. This change ensures that
only plain text (PARAM_TEXT) is allowed when adding content and that the
content is properly formatted before being output.
Mihail Geshoski
4eea25dc73