All pages attachment selector doesn't display correct selection and hangs when editing a link to an attachment given only by its filename

To reproduce, attach a file to the current page, say image.png, and follow the next steps:

• set the page wiki content to:

  [[attach:image.png]]
  

• edit the page in wysiwyg
• edit the attachment link, the "Current page" tab should be loaded when dialog is opened
• select the "All pages" tab. Although loading will be done, no selection will be made in the tree, though the input value is "image.png"
• hit Select
• the loading icon will be displayed endlessly