Fix the pickers-demo
Fix the pickers-demo

NativeScript/NativeScript,genexliu/NativeScript,hdeshev/NativeScript,genexliu/NativeScript,hdeshev/NativeScript,NativeScript/NativeScript,NativeScript/NativeScript,NativeScript/NativeScript,hdeshev/NativeScript,genexliu/NativeScript,NativeScript/NativeScript