Fix: Send proper page title to Google Analytics

1. I have only tested this solution with Universal Analytics method 

2. I added a delay to the analytic call due Discourse.title not getting updated "on time" 
I have choose an arbitrary 350ms delay. it is possible that a smaller delay might still work.
my baseline was another delay I encountered that might not be related <a href="https://github.com/discourse/discourse/blob/master/app/assets/javascripts/discourse.js#L52">Here discourse.js#L52</a>

Ideally a way without delay should be desired.