Improving focus visible per John Sweet a11y audit

From a11y audit: "When focus is on the menu items, the background color of the item under focus changes to gray. The contrast ratio of this gray color (rgb 66,66,66) to the original black color (rgb 34,34,34) is only 1.6:1—for low vision users, this may present some issues unless they know where to look. Make the background color for focused menu items a little bit brighter.  Also very difficult to perceive focus when it is on the [dropdown] ... subitems in the menu bar. Make focus on these items respond by changing background color."
Changing header tagline from h2 for semantics

Did per John Sweet suggestion: "The use of semantic markup may be misleading for <h2> tag.... All of the other level 2 headings are functional components of the site, whereas this one is more descriptive. Should it just be a "strong" strong paragraph?"
Explaining use of SEO pluging breadcrumbs use
Updating to version 1.7.5