This fixes the mobile web experience for Chrome on iOS.
Apparently, Chrome-on-iOS silently has a `viewport` module that
overrides and user-defined module by that name, causing all of our
code that accesses the viewport module to not work on that platform.
We fix this by renaming it.
When user list displays on the left, the maximum height of the
<code>stream-filters-container</code> is determined by the function
<code>confine_to_range(lo,val,high)</code>. By changing the value of
<code>lo</code> to 80, the <code>stream-filters-container</code>
resizes to 80 px instead of 40 px.
Fixes#2510.
Like the Stream Subject lists, Private messages are now shown
when the user clicks on the "Private message" link. User can drill in
to get more than 5 conversations. Selecting PMs from the user or group
PM lists on the right sidebar also opens the list & highlights the
selected conversation.
[Edited by tabbott@mit.edu to fix some small bugs.]
It's been very buggy for a while, has limited usefulness compared with
unread counts, and profiling over the weekend indicates that it's very
slow.
(imported from commit 716fe47f2bbec1bd8a6e4d265ded5c64efe2ad5c)