#128: partially implement StatusNotifierItem/AppIndicator
#128: implement DBusMenu GetLayout
#128: ToggleMonitorWindow and Exit now work
injected dependencies' names start with __
redirect Qt messages to Python
#128: updateLayout when needed.
#128: guard a parameter
move toggleMinimized to app object
#128: fix NewIcon signal emission; implement single-click on the system-tray icon.
#128: cleaning up