Added Network status checking to fix Bug [#6294] Becoming disconnected from network...

Added Network status checking to fix Bug [#6294] Becoming disconnected from network whilst running causes multiple restore connection popups.
vlc-remote will now not let you use the interface without an active connection (wlan or gprs).
This will break the use case of using vlc-remote to control a local (on device) vlc instance!
	modified:   src/accountdialog.cpp
	modified:   src/appsettings.cpp
	modified:   src/appsettings.h
	modified:   src/playermainwindow.cpp