asset tree: refresh entry should be the last option

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@2185 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
asset html5 upload: no type check -> just name

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@2186 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
image thumbnails: imagick adapter, only load first "page" in a file (otherwise this will cause problems with PSD with a PDF as an smart object)

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@2187 1f8fe7d8-47f0-464c-8d0a-336f4953ab05