Detailed Description:
It would be really handy to have a multi upload / select function. That way you
could use this modules for making galleries or for giving multiple product
sheets to download. Now you have to add as many JMFilePicker fields as files
that you want to upload. Meaning that when you need one more file, you have to
edit the template to make this happen. A multi-uploader would bring the amount
of needed fields back to 1.