fix: hide converse-dragresize when view mode is overlayed

Author: Arup3201

src/plugins/controlbox/templates/controlbox.js

@@ -35,8 +35,9 @@ function whenNotConnected(el) {
  */
 export default (el) => {
     const style = getChatStyle(el.model);
+    const is_overlayed = api.settings.get('view_mode') === 'overlayed';
     return html`<div class="flyout box-flyout" style="${style || nothing}">
-        <converse-dragresize></converse-dragresize>
+        ${is_overlayed ? html`<converse-dragresize></converse-dragresize>` : ''}
         ${el.model.get('connected')
             ? html`<converse-user-profile></converse-user-profile>
                   <div class="controlbox-pane">