fix compile error (WebSimple)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36452 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Make sure global script can access document.ggbApplet as well as window.ggbApplet in GeoGebraBooks (=when ID is set without authors knowledge)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36453 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e