Fix missing import

tp-dialog.js

@@ -5,7 +5,7 @@ This program is available under Apache License Version 2.0
 */
 
 import '@tp/tp-icon/tp-icon.js';
-import { LitElement, html, css } from 'lit';
+import { LitElement, html, css, svg } from 'lit';
 import { EventHelpers } from '@tp/helpers/event-helpers.js';
 import { closest } from '@tp/helpers/closest.js';