XWIKI-10274: Also send system information when saving Active Install pings
* Use Environment instead of Container which doesn't work since there's no request in a deamon thread ;)
* Hide technical pages that were not already hidden

XWIKI-10301: Display a pie chart of the XWiki versions used by Active Installs
XWIKI-10302: Display a pie chart of the Java versions used by Active Installs
XWIKI-10303: Display a pie chart of the Databases used by Active Installs
XWIKI-10304: Display a pie chart of the Servlet Containers used by Active Installs