[iOS][Tabs] selected index does not apply #7831

Environment

• Cross-platform modules: 6.1.0

Describe the bug

<Tabs selectedIndex="1"> does not apply.

To Reproduce

git clone https://github.com/NativeScript/nativescript-sdk-examples-js/
cd nativescript-sdk-examples-js
tns run ios

and navigate to: Tabs -> Usage example.

Actual behavior

Home tab strip is selected.

Expected behavior

Account tab strip is selected.

Sample

https://github.com/NativeScript/nativescript-sdk-examples-js/blob/master/app/ns-ui-widgets-category/tabs/usage/usage-page.xml