Currently the built-in feature of NavViewmenu does not support highlighting the parent (root) node page. It highlights the selected page when expanded, but when collapsed, it only highlights the selected node if it is at the top level. 

I have moved the mouse away, the pointer is not over an element of the NavigationView, but the SubPages remain visible. I would like it to be collapsed, and expand again when I move the mouse over the Page (the orange area).

Changing the text of a Page runtime will update the page navigation view item, but the header element won't. Reselecting the page will update the header element text.

At design time:

1. Made hierarchy through Property Builder.

2. Set a custom image or text for a RadPageViewPage

We could introduce logic to place navigation items at the bottom of the container.

Use the sample project and follow the illustrated steps in the gif file.

Expected: when you hover a page and it has sub pages, the popup is shown automatically. When you hove another page while the popup is still opened, it shouldn't remain opened.

Actual: when you hover a page and it has sub pages, the popup is shown automatically. When you hove another page while the popup is still opened, it should be closed.