Fixing scroll when getting new messages

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationActivityV2.kt

@@ -2471,7 +2471,7 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
                 // Note: The adapter itemCount is zero based - so calling this with the itemCount in
                 // a non-zero based manner scrolls us to the bottom of the last message (including
                 // to the bottom of long messages as required by Jira SES-789 / GitHub 1364).
-                recyclerView.scrollToPosition(adapter.itemCount)
+                recyclerView.smoothScrollToPosition(adapter.itemCount)
             }
         }
     }