fix(slate-metadata): link to image download showing up due to data.ad…

…dLinkToDownload being undefined #47 from eea/259256-link_bug

src/plugins/Mentions/render.jsx

@@ -63,7 +63,7 @@ export const MentionElement = ({
             to={`${flattenToAppURL(metadata['@id'])}/@@download/image/${
               metadata.id
             }`}
-            condition={data.addLinkToDownload !== false}
+            condition={!!data.addLinkToDownload}
           >
             <Widget value={output} className={className}>
               {(child) => wrapInlineMarkupText(children, (_c) => child)}