custom-styles : bugfixes in editor

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@2533 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
newsletter improvements: status in newsletter while sending + stop button

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@2534 1f8fe7d8-47f0-464c-8d0a-336f4953ab05