Added aria-labelled by to slide out tab application landmark element.
Corrected value for aria-labelledby for slide out tab.
Added aria-labelledby to application landmark on share widget.
Added aria-labelledby to application landmark on auto-complete polyfill.
Changed pe. to _pe. and replaced  with _pe.main.
Removed JSHint pe global override from footnotes.js.
Merge pull request #2208 from pjackson28/v3.0

Added aria-labelledby to a few a few plugins and polyfills to properly title the application landmark