(core) Remove code related to newui

Summary: Change code that conditionally depended on #newui in the URL to assume that everything is always in the new UI now.

Test Plan: this

Reviewers: dsagal

Reviewed By: dsagal

Subscribers: dsagal

Differential Revision: https://phab.getgrist.com/D3246

app/client/ui/RightPanel.ts

@@ -343,7 +343,7 @@ export class RightPanel extends Disposable {
 
       dom.maybe((use) => use(this._pageWidgetType) !== 'chart', () => [
         cssSeparator(),
-        dom.create(VisibleFieldsConfig, this._gristDoc, activeSection, true),
+        dom.create(VisibleFieldsConfig, this._gristDoc, activeSection),
       ]),
     ]);
   }