Merge pull request #2035 from pjackson28/v3.0

Ported v3.1 unlinked headings in mega menus support
Merge pull request #2046 from pjackson28/v3.0

Ported v3.1 fixes for #2007 to v3.0
Merge pull request #2048 from pjackson28/v3.0

Ported new v3.1 fixes for #2007 to v3.0
Merge pull request #2049 from pjackson28/v3.0

Fixed JSHint issues
Fixed various issues in working examples index pages.
Merge pull request #2051 from EricDunsworth/v3.0-demos-indexes

Fixed various issues in working examples index pages.
Merge pull request #2065 from pjackson28/v3.0

Corrected French About WET links.
Merge pull request #2068 from pjackson28/v3.0

Removed unnecessary address element from the new working examples footer
pe-ap: fixed samed page link behaviour in Firefox

Using the back button after clicking a same page link now returns
scroll position to the original position of the same page link.
Merge pull request #2073 from patheard/firefox-named-anchor

pe-ap: fixed samed page link behaviour in Firefox
Resolve merge conflicts.