Fix broken timing expansion

For some reason the clicks sometimes have no effect. Possibly async
javascript loading or similar. Keep clicking until the section is open.

moodle/quiz-change-times.py

@@ -152,13 +152,18 @@ def update_quiz(
 
     # Open edit timing section
     browser.driver.get(get_quiz_edit_url(quiz))
+
     expander = browser.driver.find_element(
         By.CSS_SELECTOR, "#id_timing .ftoggler a"
     )
-    WebDriverWait(browser.driver, WAIT_TIMEOUT).until(
-        ec.element_to_be_clickable(expander)
-    )
-    expander.click()
+    check_box = None
+    expanded = False
+    while not expanded:
+        expander.click()
+        check_box = browser.driver.find_element(
+            By.CSS_SELECTOR, f"#id_time{mode}_enabled"
+        )
+        expanded = check_box.is_displayed()
 
     # Make sure open/close quiz checkbox matches notime
     check_box = browser.driver.find_element(