Fix: account for new Export Data dialog

- Stricter targeting of buttons since Register and Export Data dialogs appear on screen at the same time
- Locate success notification first since it appears first (and cannot be "clicked" through the overlapping dialog-overlay)

test-playwright/testUtils.ts

@@ -158,10 +158,10 @@ export async function generateAndRegisterEthrUser(page: Page): Promise<string> {
     .fill(`${newDid}, ${contactName}`);
   await page.locator("button > svg.fa-plus").click();
   // register them
-  await page.locator('div[role="alert"] button:has-text("Yes")').click();
+  await page.locator('div[role="alert"] button:text-is("Yes")').click();
   // wait for it to disappear because the next steps may depend on alerts being gone
   await expect(
-    page.locator('div[role="alert"] button:has-text("Yes")')
+    page.locator('div[role="alert"] button:text-is("Yes")')
   ).toBeHidden();
   await expect(page.locator("li", { hasText: contactName })).toBeVisible();