fix fr translation (entities not recognized in button)
Use a different id for field edit form and listing form, to ease
  reuse of overlay behaviours.
  
edit popupform did not close when listing form name was not "fields" but
"edit" (wich is by default when we use schemaeditor without dexterity)
more consistent with add form
Merge pull request #13 from tdesvenain/master

Use a different id for field edit form and listing form