Show nested feature decorators in a list (#173)

* Show nested feature decorators in a list

* Fix swapping decorator indices

* Move wrapper model creation to separate function

* Add setting string node on enter

src/app/Utils.ts

@@ -7,6 +7,10 @@ export function isPromise(obj: any): obj is Promise<any> {
 	return typeof (obj as any)?.then === 'function' 
 }
 
+export function isObject(obj: any) {
+	return typeof obj === 'object' && obj !== null
+}
+
 const dec2hex = (dec: number) => ('0' + dec.toString(16)).substr(-2)
 
 export function hexId(length = 12) {