Include submission title in comments page <title> HTML tag

[robbintt]

Hi, great app!

It would be really helpful if the comments title were set as the title of the submission. It seems like it would be simple to use the title from the hacker news API instead of the current title on each comments section, "Hacker News".

This would also mirror how hacker news does its own comments and help my tabbed browsing tremendously. Thanks!!

[robbintt]

Here is a sample title tag from a Hacker News submission:

<title>My Top 100 Programming, Computer and Science Books: Part Four | Hacker News</title>

https://news.ycombinator.com/item?id=9835285