The destination label highlight for a M3 NavigationRail with isExtended:true has the wrong width or the wrong origin.

This is a regression for useMaterial3:true. It's possible (I haven't checked) that it was introduced in #116108.

Here's an example that demonstrates the problem: https://dartpad.dev/?id=272d62da895a9e17c38c7f562a6d3d5f&channel=master