How to reproduce

• Connect to the cms
• Create a page
• Add the template page
• Select a zone
• Add a content article
• Edit the content
• Select the "contenu" zone
• Click on add a shared image
• The explorer is displayed with images files
• Select one to add a image
• Click on add a shared image to add an other image

Actual behavior

• The explorer is displayed with all files : .zip, .odt, .pdf..

Expected behavior

• The explorer is displayed with just images files