Fixes #813 Notifications with wrong language

New notifications do not check language setting properly
Missing parameter
#808 should be finished now
Merge pull request #943 from PirataNervo/feature-808

#808 should be finished now
Merge pull request #921 from PirataNervo/featurefix-813

Fixes #813 Notifications with wrong language
WIP #882 Add more hooks v2

xmlhttp.php
WIP #882 Add more hooks v2

Fixes ACP hooks positions.
WIP #916 An actual warnings class
WIP #882 Add more hooks v2

showteam.php