Finish importer, add applicable import layers to every theme by default

UI/ImportFlow/ConfirmProcess.ts

@@ -0,0 +1,32 @@
+import Combine from "../Base/Combine";
+import {FlowStep} from "./FlowStep";
+import {UIEventSource} from "../../Logic/UIEventSource";
+import Link from "../Base/Link";
+import {FixedUiElement} from "../Base/FixedUiElement";
+import CheckBoxes from "../Input/Checkboxes";
+import Title from "../Base/Title";
+
+export class ConfirmProcess<T> extends Combine implements FlowStep<T> {
+
+    public IsValid: UIEventSource<boolean>
+    public Value: UIEventSource<T>
+
+    constructor(v: T) {
+
+        const toConfirm = [
+            new Combine(["I have read the ", new Link("import guidelines on the OSM wiki", "https://wiki.openstreetmap.org/wiki/Import_guidelines", true)]),
+            new FixedUiElement("I did contact the (local) community about this import"),
+            new FixedUiElement("The license of the data to import allows it to be imported into OSM. They are allowed to be redistributed commercially, with only minimal attribution"),
+            new FixedUiElement("The process is documented on the OSM-wiki (you'll need this link later)")
+        ];
+
+        const licenseClear = new CheckBoxes(toConfirm)
+        super([
+            new Title("Did you go through the import process?"),
+            licenseClear
+        ]);
+        this.SetClass("link-underline")
+        this.IsValid = licenseClear.GetValue().map(selected => toConfirm.length == selected.length)
+        this.Value = new UIEventSource<T>(v)
+    }
+}