feat: shows monitor poster on modal

assets/components/preview-content-dialog.js

@@ -28,6 +28,9 @@ export default class PreviewContentDialog extends HTMLDialogElement {
     }
 
     display({ heading, content }) {
+        if (this.hasAttribute('mdWidth')) {
+            this.style.width = this.getAttribute('mdWidth');
+        }
         this.setHeading(heading);
         this.setContent(content);
         this.showModal();