We suspect that these seem to be causing a regression where scrolling
in narrowed views gets really sluggish, but we haven't totally been
able to figure out why since it's challenging to reproduce locally.
(It currently manifests itself on staging but not prod.)
So for now we'll back them out. Here's the full set of things:
Revert "Cause update_floating_recipient_bar to get called less frequently."
This reverts commit a6c1518c4001a2dde44d7b512236795da3ccd351.
Revert "Remove double-scroll in un-narrowing code."
This reverts commit 3dde6c27ffa1e8afa1a084b1b2baee3bc0512962.
Revert "Reset our scroll position if we change our hash to "#"."
This reverts commit 925b44d770c96dafaabebc9e0114f9a3b8f53c4d.
Revert "Properly update floating subject bar when you are at top of page."
This reverts commit 6633cc8a81aedcbb31b30d7c1f27816f8808c700.
(imported from commit a273730581cef30c33bedf701659ee084434f8ad)
Changing the hash to "#" causes Chrome to jump to the top of the page
on Mac OS X. This commit doesn't actually fix any bug, but it
is necessary for my *next* commit, where otherwise you'd have to
ensure that the scroll code came *after* the hashchange code.
(imported from commit 925b44d770c96dafaabebc9e0114f9a3b8f53c4d)