Lot's of small improvements

UI/Base/VerticalCombine.ts

@@ -0,0 +1,40 @@
+import {UIElement} from "../UIElement";
+
+export class VerticalCombine extends UIElement {
+    private _elements: UIElement[];
+    private _className: string;
+
+    constructor(elements: UIElement[], className: string = undefined) {
+        super(undefined);
+        this._elements = elements;
+        this._className = className;
+    }
+
+    protected InnerRender(): string {
+        let html = "";
+        for (const element of this._elements) {
+            if (!element.IsEmpty()) {
+                html += "<div>" + element.Render() + "</div>";
+            }
+        }
+        if(html === ""){
+            return "";
+        }
+        if (this._className === undefined) {
+            return html;
+        }
+        return "<div class='"+this._className+"'>" + html + "</div>";
+    }
+    InnerUpdate(htmlElement: HTMLElement) {
+        for (const element of this._elements){
+            element.Update();
+        }
+    }
+    
+    Activate() {
+        for (const element of this._elements){
+            element.Activate();
+        }
+    }
+
+}