fix(network): fix excessive network prompting on failures, add VPN

connection statuses

core/internal/server/network/backend.go

@@ -79,4 +79,6 @@ type BackendState struct {
 	IsConnectingVPN        bool
 	ConnectingVPNUUID      string
 	LastError              string
+	VPNError               string
+	VPNErrorUuid           string
 }