e2e: fix mentions

test/appium/tests/medium/test_activity_center.py

@@ -332,7 +332,6 @@ class TestActivityMultipleDevicePR(MultipleSharedDeviceTestCase):
         self.errors.verify_no_errors()
 
     @marks.testrail_id(702957)
-    @marks.xfail(reason="Blocked by 15500")
     def test_activity_center_mentions(self):
         self.home_1.jump_to_communities_home()
         self.home_2.jump_to_card_by_text('# %s' % self.channel_name)

test/appium/views/chat_view.py

@@ -811,7 +811,7 @@ class ChatView(BaseView):
         self.set_community_image_button = Button(self.driver, translation_id='community-thumbnail-image',
                                                  suffix='/following-sibling::android.view.ViewGroup')
         self.confirm_create_in_community_button = Button(self.driver, translation_id="create")
-        self.mentions_list = BaseElement(self.driver, accessibility_id="mentions-list")
+        self.mentions_list = BaseElement(self.driver, accessibility_id="user-list")
 
         # New UI
         self.pinned_messages_count = Button(self.driver,