SQL Migration extension - accessibility bug - fixes filter enter and focus (#15953)

* fix filter enter and focus

* debounce and fix search

* refactor null check and undo change/remove await

* using control types to improve and remove 'any'

extensions/sql-migration/src/api/utils.ts

@@ -156,3 +156,35 @@ export function findDropDownItemIndex(dropDown: DropDownComponent, value: string
 
 	return -1;
 }
+
+export function debounce(delay: number): Function {
+	return decorate((fn, key) => {
+		const timerKey = `$debounce$${key}`;
+
+		return function (this: any, ...args: any[]) {
+			clearTimeout(this[timerKey]);
+			this[timerKey] = setTimeout(() => fn.apply(this, args), delay);
+		};
+	});
+}
+
+export function decorate(decorator: (fn: Function, key: string) => Function): Function {
+	return (_target: any, key: string, descriptor: any) => {
+		let fnKey: string | null = null;
+		let fn: Function | null = null;
+
+		if (typeof descriptor.value === 'function') {
+			fnKey = 'value';
+			fn = descriptor.value;
+		} else if (typeof descriptor.get === 'function') {
+			fnKey = 'get';
+			fn = descriptor.get;
+		}
+
+		if (!fn || !fnKey) {
+			throw new Error('not supported');
+		}
+
+		descriptor[fnKey] = decorator(fn, key);
+	};
+}