- Search Widget: invalid <button> content
- Search Widget: invalid list content

- fixing multi-line line focus bug
- making focus specific for osu logo in footer

- moving form labels offscreen so they are not visible to users but are still there for screen readers

- close btn contrast ratio
- adding aria-label to carousel

- carousel updates
- mobile header image id update

- updating header element to contain main menu and breadcrumbs
- updating footer element to contain subfoot div
- updating osu navbar h2 tag to make not visible to screen readers