Squashed minor issue fixes in inline discussion view

Make this selector more specific, was getting overrides

Fix Teams implementation of inline discussion

Fix LMS tests

Work on pagination support

Jasmine tests for this feature

Focus works when navigating between list and detail

Fix safe template violations

common/test/acceptance/pages/lms/discussion.py

@@ -504,7 +504,7 @@ class InlineDiscussionPage(PageObject):
         ).fulfill()
 
     def get_num_displayed_threads(self):
-        return len(self._find_within(".discussion-thread"))
+        return len(self._find_within(".forum-nav-thread"))
 
     def has_thread(self, thread_id):
         """Returns true if this page is showing the thread with the specified id."""