Modify the Popup container's HTML to include a banner above the Title

[Yuriko]

I need to modify the popup to include a new element (could be a styled HTML table row) between the existing pagination action bar and the Title (see mockup with red/blue banner below). Can I modify the default popup's HTML container to include a new <div> element to display the banner incorporating JS and CSS? I am working in Experience Builder Developer v1.13 which incorporates extensive Calcite integration making access to custom styling of specific elements more challenging. Thanks!