feat(instructeurs/procedure/dossiers#extend_conservation): add extends duree conservation in action button list, also rewire this action for user [extend by procedure.duree_conservation_dans_ds by default] but force 1.month for instructeur. add new icon for standby based on https://en.wikipedia.org/wiki/Power_symbol

app/models/dossier.rb

@@ -569,6 +569,7 @@ class Dossier < ApplicationRecord
   end
 
   def close_to_expiration?
+    return false if en_instruction?
     approximative_expiration_date < Time.zone.now
   end