Update Mail.class.php

Fix of PHPDoc
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
Fix comment issue in Highlighter

Multiline comments that have a single line comment as prefix are
parsed correctly now
Fixed missing language variables
Merge branch 'master' of github.com:WoltLab/WCF
Fixes inclusion of application plugin LESS files

Closes #1581
Removes obsolete table alias
Fixes possible issue with WCF.Upload.Parallel
Updating minified JavaScript files
Properly update fields after redirect in HTTPRequest
Fixed issues related to disabled CKEditor
Updating minified JavaScript files
Fixed active tab if package download failed
Merge branch 'master' of github.com:WoltLab/WCF
Preparing release 2.0.0 RC 5