How to have a File Manager and an image uploader entities linked to an attachment entity?

Hello,   I tried using a file Manager and an Image Uploader widgets, I placed each of them inside a dataview connected to a fileAttachment Entity and ImageAttachment Entity (see my domain model). Sadly, I can't browse in the File Manager nor the Image Uploader. (see my PopUp page)   I want to avoid using an other PopUp for choosing the file/image.   Is there a way to fix that?   Thanks for your help.  
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