when using FileOpenService and FileSaveService to open/save file, dialog of opening/saving file doesn't show up
Steps to reproduce:
Launch the following applet/jnlp application
http://sqeweb.us.oracle.com/deployment1/deployment_6_UR_int_exec_ws/6/deployment/src/javafx/fxfeaturesTest/fxfeaturesTest/html/FileService.html
http://sqeweb.us.oracle.com/deployment1/deployment_6_UR_int_exec_ws/6/deployment/src/javafx/fxfeaturesTest/fxfeaturesTest/html/FileService.jnlp
FileOpenService and FileSaveService are invoked in them to open/save file.
if there is no opening and saving file dialog show up, bug is reproduced

Source code location:
http://sqeweb.us.oracle.com/deployment1/deployment_6_UR_int_exec_ws/6/deployment/src/javafx/fxfeaturesTest/fxfeaturesTest/src