Salsa: Cleaning up the instructions

The instructions for participants was really verbose and the
wall-of-text approach is pretty bad.  This strips out a lot of the
unneeded text and information, and rearranges some of the UI elements to
hopefully make it less intimidating and easier to use

BUG=chromium:187154
TEST=manually tested using dev server

Change-Id: I7b87ea960cd5ee5cfe190cfe16b43d8efcd2a7fc
Signed-off-by: Charlie Mooney <charliemooney@chromium.org>
4 files changed