fix several issues, add remote controls to new UI

ColorControl.UI/wwwroot/helper.js

@@ -14,4 +14,12 @@ export function OpenModal(modalId) {
 export function ShowToast(toastId) {
     const toastBootstrap = bootstrap.Toast.getOrCreateInstance('#' + toastId);
     toastBootstrap?.show();
+}
+
+export function GetElementDimensions(elementId) {
+    return document.getElementById(elementId).getBoundingClientRect();
+}
+
+export function GetElementClassName(elementId) {
+    return document.getElementById(elementId).className;
 }