The click target was still for #hamburger even though it has since
been changed to .hamburger. This fixes the selectors to make it work
with the new className declaration over ID.
This preserves the scrolltop state of the user when they enter into
an integration's specifics, so when they exit out it scrolls them
back down the page.
Fixes: #4424.
This fixes the hubot text that still stays when you transition to
integration details along with fixing the first animation that is
choppy and previews briefly before fading in.
Fixes#4210.
Checking by href is a flawed approach due to the fact that hashes
are included in the href and will throw off the results of
returning the last block in a path. The window.location.pathname
property is a much better indicator of the current path.
Brock Whittaker