discourse/discourse — pull request #2050 by verg (2014-03-03 22:54:56+00:00)
Title: Scroll to Top of Topic instead of Reloading

This PR changes the following links to use URLs with the first post rather than the topic url:

1. Clicking a Topic's header.
1. Quotes and Replies to the first post.
1. Jump to Top button in the Progress Bar.

For example. We'll now link to `/t/discourse-general-polish/13184/1/` instead of than `/t/discourse-general-polish/13184`. This loads the topic much more quickly than the full page reload.

From: https://meta.discourse.org/t/discourse-general-polish/13184
>We unconditionally reload topic page if you click on "title". instead it should scroll you to top if post 0 is already in memory. Same for in between posts navigation (eg quoting and so on)