Replace double slashes in calculated upload paths (fixes #49207)

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/formhandler/trunk@76774 735d13b6-9817-0410-8766-e36946ffe9aa
Reattach AJAX validation events after AJAX submit (fixes #49465)

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/formhandler/trunk@76776 735d13b6-9817-0410-8766-e36946ffe9aa
New setting 'ajaxSubmitCallback' (resolves #46775)

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/formhandler/trunk@76777 735d13b6-9817-0410-8766-e36946ffe9aa