fix error is OfferDialog where assignment to a project was missed, plus some refactors

test-playwright/00-noid-tests.spec.ts

@@ -128,6 +128,7 @@ test('Check User 0 can register a random person', async ({ page }) => {
   await deleteContact(page, newDid);
   // go the activity page for this new person
   await page.goto('./did/' + encodeURIComponent(newDid));
+  // maybe replace by: const popupPromise = page.waitForEvent('popup');
   let error;
   try {
     await page.waitForSelector('div[role="alert"]', { timeout: 2000 });