Fix high priority web site issues

[jlouvel]

See the list of issues:
https://github.com/restlet/restlet-sites/issues?labels=Priority%3A+high&page=1&state=open

[jlouvel]

I created a specific 2.2 RC4 milestone on the Restlet Sites repo:
https://github.com/restlet/restlet-sites/issues?labels=&milestone=1&page=1&state=open

[jlouvel]

All issues fixed, thanks Thierry. Closing