This removes the large "New stream message" and "New private message"
from the left sidebar. It also makes the default action when clicking
inside the composebox the same as the "New stream message" button used to
do (instead of replying to the stream-subject pair at the current cursor).
(imported from commit 316f03a35b781aca4c42555f74b99c4332ff42de)
Really, the "correct" way to do this is to undo "scrolltheworld", and
then just have a compose div that always lives underneath the message
list div. (This will also allow us to deal much more reasonably with
the whole "Is the composebox in focus" thing.)
In the interest of prototyping something more rapidly, though, we
adopt the somewhat more hackish approach, with the understanding that
much of it will probably be simplified later.
(imported from commit e2754be155c522b6dac28e7b84c62bd2030217c8)
Otherwise we're by default testing the phone size layout, which
probably isn't what we want the default test setup to be.
(imported from commit a76b2d51c18824b0a5f6342cce848aca87dda15a)
