Merge pull request #4970 from EricDunsworth/v3.1-broken-link-fixes

Documentation: Fixed various broken/wrong links.
Added wb-navcurr styling to mega menu (fixes #4916)
Merge pull request #4983 from pjackson28/addwbnavcurrstylingmegamenuv31

Added wb-navcurr styling to mega menu (fixes #4916)
Documentation: Renamed "Examples pratiques" links to "Exemples pratiques" in French pages.