Update wait for mini-notification in testing to be more fine-grained; remove flaky test decorator

common/test/acceptance/pages/common/utils.py

@@ -17,8 +17,18 @@ def wait_for_notification(page):
         """Whether or not the notification is finished showing."""
         return page.q(css='.wrapper-notification-mini.is-hiding').present
 
-    EmptyPromise(_is_saving, 'Notification should have been shown.', timeout=60).fulfill()
-    EmptyPromise(_is_saving_done, 'Notification should have been hidden.', timeout=60).fulfill()
+    EmptyPromise(
+        _is_saving,
+        'Notification should have been shown.',
+        try_interval=0.1,
+        timeout=60,
+    ).fulfill()
+    EmptyPromise(
+        _is_saving_done,
+        'Notification should have been hidden.',
+        try_interval=0.1,
+        timeout=60,
+    ).fulfill()
 
 
 def click_css(page, css, source_index=0, require_notification=True):

common/test/acceptance/tests/studio/test_studio_library.py

@@ -129,7 +129,6 @@ class LibraryEditPageTest(StudioLibraryTest):
         """
         self.assertFalse(self.browser.find_elements_by_css_selector('span.large-discussion-icon'))
 
-    @flaky  # TODO fix this, see TNL-2322
     def test_library_pagination(self):
         """
         Scenario: Ensure that adding several XBlocks to a library results in pagination.