impl matrix continuation so i can get rid of per-msg get-set

main.go

@@ -23,8 +23,10 @@ func main() {
 	if err := config.Refresh(); err != nil {
 		panic(err)
 	}
-	if err := matrixrecv(); err != nil {
-		panic(err)
+	if config.Get().Message.Matrix.ReceiveEnabled {
+		if err := matrixrecv(); err != nil {
+			panic(err)
+		}
 	}
 	lock := &sync.Mutex{}
 	go func() {
@@ -138,6 +140,11 @@ func matrixrecv() error {
 		}
 		setNewPauses(pauses)
 	}()
+	conf := *config.Get()
+	if conf.Message.Matrix.Continuation != sender.Continuation() {
+		conf.Message.Matrix.Continuation = sender.Continuation()
+		config.Set(conf)
+	}
 	return nil
 }