fix: image upload entity design preview

Author: gjulivan

packages/pluggableWidgets/rich-text-web/src/RichText.editorConfig.ts

@@ -88,7 +88,7 @@ export function getPreview(props: RichTextPreviewProps, isDarkMode: boolean): St
         richTextPreview.children?.push(
             rowLayout({ columnSize: "grow", borders: true, borderWidth: 1, borderRadius: 2 })(
                 dropzone(
-                    dropzone.placeholder(" image upload placeholder widget"),
+                    dropzone.placeholder("Place image selection widget here"),
                     dropzone.hideDataSourceHeaderIf(false)
                 )(props.imageSourceContent)
             )

packages/pluggableWidgets/rich-text-web/src/RichText.editorPreview.tsx

@@ -9,6 +9,11 @@ export function preview(props: RichTextPreviewProps): ReactElement {
     return (
         <div className="widget-rich-text">
             <img src={doc} alt="" />
+            {props.imageSource && (
+                <props.imageSourceContent.renderer caption="Place image selection widget here">
+                    <div />
+                </props.imageSourceContent.renderer>
+            )}
         </div>
     );
 }