Update Mail.class.php

Fix of PHPDoc
Fixes variable name
Fix for unclosed quote tags discarding following content
Merge branch 'master' of github.com:WoltLab/WCF
Added missing language variable
Merge branch 'master' of github.com:WoltLab/WCF
Merge branch 'master' of github.com:WoltLab/WCF
Fixed missing language variable
Fixed missing language variable
Removed obsolete code
Merge branch 'master' of github.com:WoltLab/WCF
Removed obsolete code
Filter results by active package update server ids
Disabled check for PHP requirements
LinkHandler now passes application-component to Route instance
Fixed missing module setting
Removed obsolete code
Fixed missing language variables
Merge branch 'master' of github.com:WoltLab/WCF
Updating minified JavaScript files