Previously, we waited until we'd fully loaded the home view to start
calling get_events, which:
(A) didn't make sense non-message related events
(B) resulted in our throwing "get_updates not started" errors when
users sent a message before the home view was fully loaded.
This commit only fixes problem (B); to fix problem (A) we will need to
change the event capture code to only capture some events.
(imported from commit 2aacd6bdfd1e7d7707e3a724f1fde7da4a556538)
2fb9baafb4