refactored to match patter

src/plugins/controlbox/templates/controlbox.js

@@ -35,9 +35,8 @@ 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}">
-        ${is_overlayed ? html`<converse-dragresize></converse-dragresize>` : ''}
+        ${api.settings.get('view_mode') === 'overlayed' ? html`<converse-dragresize></converse-dragresize>` : ''}
         ${el.model.get('connected')
             ? html`<converse-user-profile></converse-user-profile>
                   <div class="controlbox-pane">