Add update-script for Kwc_Newsletter_Detail_Mail_Component (-mail to _mail)

Updates database for changes in acc9087ea3458a1395f29eb23545777cce3fbcbd
Move update-script to kwc_mail_redirect and add missing line

Updates commit 7e2efddf3844780c626785774412238afa305bb3
Add url-decode for Statistics-Controller to show better readable link-title