moved creation ob tag name to Document_Tag

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@2793 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
document image editable: fixed problem with marker & hotspot positioning

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@2794 1f8fe7d8-47f0-464c-8d0a-336f4953ab05