fix(frontend): Improve flakiness issues (#12617)

* small improvements to reduce flakiness

* disable throtteling to fix flaking tests

src/frontend/tests/pui_settings.spec.ts

@@ -368,17 +368,17 @@ test('Settings - Admin - Background Tasks', async ({ browser }) => {
 });
 
 test('Settings - Admin - Barcode History', async ({ browser }) => {
-  // Login with admin credentials
-  const page = await doCachedLogin(browser, {
-    user: adminuser
-  });
-
-  // Ensure that the "save scans" setting is enabled
+  // Ensure that the "save scans" setting is enabled; done before first load of test to reduce flakiness
   await setSettingState({
     setting: 'BARCODE_STORE_RESULTS',
     value: true
   });
 
+  // Login with admin credentials
+  const page = await doCachedLogin(browser, {
+    user: adminuser
+  });
+
   // Scan some barcodes (via API calls)
   const barcodes = ['ABC1234', 'XYZ5678', 'QRS9012'];
   const api = await createApi({});