Correct migration problem from anterior versions
BDD site with copy, with additionnalInstaller
need to be taggued as 1.0 before doin anohter tag to remove the useless link between drop/dropzone and drop/user.
this links are now in the copy witch mean
we have now dropzone/copy, user/copy, copy/drops
Set the Drop action view ok
new option perpertualRedrop

user can now drop several times. not done in admin views for now.