The "active" CSS class must be on "nav-link" element, see `_navbar.scss`:
```css
.nav-link.active {
color: $navbar-dark-active-color;
}
```
Co-authored-by: XhmikosR <xhmikosr@gmail.com>
Replaces shorter examples with more sensible/representative/inforrmative text. For longer passages, resorted to using SFW extracts from http://katyperryipsum.com/
* Rename `sr-only`/`sr-only-focusable`
To be more representative of the fact that these are not necessarily "screen reader" specific, but actually apply to assistive technologies in general (and also things like Alexa/Siri/etc). Goes hand-in-hand with #31133
Co-authored-by: XhmikosR <xhmikosr@gmail.com>
