Replaces iterator facade over the HeroService because webpack threw up.
Also this was an obscure distraction for readers with no obvious benefits.
PR Close#18965
Add visually hidden class and apply to h2 in search results
Changed h2 group headers to h3s
Add roles to main and content
Fix API material icon placement
Image alt additions where needed
Add lang attribute to html tag
Add aria-label on search input
janith
Brandon
Vani
Jesus Rodriguez
Ward Bell
Stefanie Fluin
Peter Bacon Darwin