Added X display access control for backend popups. Xhost is set by vpn-gui/gui.sh, but we can't rely on the GUI being started before the first popup.
Added X display access control for backend popups.
Xhost is set by vpn-gui/gui.sh, but we can't rely on the GUI being started before the first popup.

privateon/PrivateOn-VPN,privateon/PrivateOn-VPN,privateon/PrivateOn-VPN