#59 Update operator control panel with various status indicators

[Dan Streetman]

It may be useful to add various status indicators to the top of the operator control panel, like:
-current state of various active pages (e.g. poll time, etc)
-total/free memory on scoreboard system
-cpu load on scoreboard system

etc...

[Andrew]

-number (and names) of remote/local users. (computer name, and if available, operator name. Perhaps on a per active browser screen basis)