[ui] transient connecting state

gui/components/Footer.qml

gui/components/Header.qml

gui/components/Home.qml

gui/components/Locations.qml

gui/components/MainView.qml

gui/components/Preferences.qml

gui/components/SignalIcon.qml

gui/components/Splash.qml

gui/components/StatusBox.qml

gui/components/ThemedPage.qml

gui/components/VPNState.qml

gui/components/WrappedRadioButton.qml

gui/gui.qrc

gui/main.qml

gui/themes/themes.js

pkg/backend/status.go

pkg/bitmask/bitmask.go

pkg/vpn/bonafide/bonafide.go

pkg/vpn/bonafide/gateways.go

pkg/vpn/openvpn.go