Split UI build (#681)

* Split ui build into build and build-ent folders

* remove is_standalone var

Co-authored-by: RoyUP9 <87927115+RoyUP9@users.noreply.github.com>

ui/src/AppChooser.tsx

@@ -0,0 +1,18 @@
+import React, {Suspense} from 'react';
+import LoadingOverlay from "./components/LoadingOverlay";
+
+const AppChooser = () => {
+
+    let MainComponent;
+    if (process.env.REACT_APP_OVERRIDE_IS_ENTERPRISE === "true") {
+        MainComponent = React.lazy(() => import('./EntApp'));
+    } else {
+        MainComponent = React.lazy(() => import('./App'));
+    }
+
+    return <Suspense fallback={<LoadingOverlay/>}>
+        <MainComponent/>
+    </Suspense>;
+}
+
+export default AppChooser;