fix(champs): finish EditableChampComponent refactor

app/models/champ.rb

@@ -51,6 +51,7 @@ class Champ < ApplicationRecord
     :simple_drop_down_list?,
     :linked_drop_down_list?,
     :non_fillable?,
+    :fillable?,
     :cnaf?,
     :dgfip?,
     :pole_emploi?,

app/models/type_de_champ.rb

@@ -186,6 +186,10 @@ class TypeDeChamp < ApplicationRecord
     drop_down_other == "1" || drop_down_other == true
   end
 
+  def fillable?
+    !non_fillable?
+  end
+
   def non_fillable?
     type_champ.in?([
       TypeDeChamp.type_champs.fetch(:header_section),