[FEATURE] TCA-like wizard for additional parameters

Resolves: #53252

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/direct_mail_userfunc/trunk@81156 735d13b6-9817-0410-8766-e36946ffe9aa
[BUGFIX] #53274: Field evaluation is not taken into account

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/direct_mail_userfunc/trunk@81157 735d13b6-9817-0410-8766-e36946ffe9aa