PERF: move 3 more option columns out of the user table

db/migrate/20160225050319_move_tracking_options_to_user_options.rb

@@ -0,0 +1,16 @@
+class MoveTrackingOptionsToUserOptions < ActiveRecord::Migration
+  def change
+    add_column :user_options, :auto_track_topics_after_msecs, :integer
+    add_column :user_options, :new_topic_duration_minutes, :integer
+    add_column :user_options, :last_redirected_to_top_at, :datetime
+
+    execute <<SQL
+    UPDATE user_options
+    SET auto_track_topics_after_msecs = users.auto_track_topics_after_msecs,
+        new_topic_duration_minutes = users.new_topic_duration_minutes,
+        last_redirected_to_top_at = users.last_redirected_to_top_at
+    FROM users
+    WHERE users.id = user_options.user_id
+SQL
+  end
+end