OK–I updated the site from 4.4.8 to 5.0, saved, cleared caches, then reviewed on the latest versions of Firefox, Edge, and Chrome. As you can see from the three screenshots, the result was the same on all three–menu bar wrong color, left justified, sidebar top margin missing.
I reverted the production site to 4.4.8 to bring things back to normal, but I will clone it to a test site and 5.0 if that will help.