Black Skyline – Nav Bar white end

I was trying to change the Head text, which I did, but now my top navigation bar is extended to far to right and has white tip on it. I see in “Design” folder (images) there is a menu_bar.png, but I can’t seem to find it in the theme anywhere (in css, functions or any other folder) to see where it is used.

I created a child theme of the original and have compared all lines of new .css style changes, but nothing should have pushed this out.

Here is my test site:
https://www.washingtoncountysheriffwi.org/cms/

Any suggestions appreciated. I could go back to my backup, but I would rather learn where things are and how to fix them. I do front-end coding, so am familiar with HTML and CSS.

Thanks,