Insert image works again in Web (dimension was wrong since camera fixes)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@38156 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Windows8 fixes

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@38157 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e