LP#1564508 Hatch status in hamburger, remove statusbar

LP#1564508 Hatch status in hamburger, remove statusbar

* Move the Hatch connectivity status indicator into the upper-right
  hamburger menu.

* Removes the long-hidden hatch/websockets statusbar.

* Since the Hamburger forces a re-digest of the interface when opened,
  the code no longer attempts to force the page to re-$apply() when
  the Hatch connection opens or closes.  It's no longer necesssary
  (and was buggy).

* The WebSockets connectivity status is not added to the hamburger.  The
  websockets connection will go up and down regularly as connections
  expire and reset.  Having the indicator flash could lead to
  unneccesary panic.  Plus, if websockets are down, staff can't log in
  anyway.

Signed-off-by: Bill Erickson <berickxx@gmail.com>