Fix import flow for more advanced scenarios

UI/ImportFlow/Introdution.ts

@@ -0,0 +1,20 @@
+import Combine from "../Base/Combine";
+import {FlowStep} from "./FlowStep";
+import {UIEventSource} from "../../Logic/UIEventSource";
+import Translations from "../i18n/Translations";
+import Title from "../Base/Title";
+
+export default class Introdution extends Combine implements FlowStep<void> {
+    readonly IsValid: UIEventSource<boolean> = new UIEventSource<boolean>(true);
+    readonly Value: UIEventSource<void> = new UIEventSource<void>(undefined);
+    
+    constructor() {
+        super([
+          new Title(  Translations.t.importHelper.title),
+            Translations.t.importHelper.description,
+            Translations.t.importHelper.importFormat,
+        ]);
+        this.SetClass("flex flex-col")
+    }
+    
+}