Navigation bar highlighting script is not working properly

[guetzerik]

The script controlling the highlight of message names in the navigation bar has issues hooking into the containers for the message links.

The script is trying to find containers that match "nav a [href=]". When the HTML document was transferred to git, the href links were updated to URL links that don't fit the string we match against.

The expected containers look like this:

The containers in the hosted dbc_description look like this:

This issue causes the script to throw constant errors as you scroll down the page.