Comment 28 for bug 683084

Summary from Neil of the current implementation in Unity:

"""
- Every monitor has a panel
- Only primary monitor has the Ubuntu button, the rest just have the
menubar + indicators.
- *The monitor with the active window* has a visible
menubar/appname/etc, other monitors do not show their menubar
- The menubar follows the active window, so if you move the window from
one monitor to another, the menubar goes to the panel on that monitor
- Even though you can't see the menubar, drag-down to unmaximise and
double-click to unmaximse still work on the panels for maximised windows
*that are on that panels monitor*
- Alt+$foo or F10 show the menu *on the monitor with the active window*
and cycling through the menus is contained to that monitor
- Dash/launcher stick with the ubuntu button on the primary monitor
"""