ZODB Components: Make 'Origin' field read-only as this is set during migration...

ZODB Components: Make 'Origin' field read-only as this is set during migration and should not be modified later on (cf632afb).

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/ComponentMixin_view/my_source_reference.xml

@@ -11,6 +11,7 @@
             <value>
               <list>
                 <string>display_width</string>
+                <string>editable</string>
                 <string>title</string>
               </list>
             </value>
@@ -68,6 +69,10 @@
                     <key> <string>display_width</string> </key>
                     <value> <int>20</int> </value>
                 </item>
+                <item>
+                    <key> <string>editable</string> </key>
+                    <value> <int>0</int> </value>
+                </item>
                 <item>
                     <key> <string>field_id</string> </key>
                     <value> <string>my_view_mode_reference</string> </value>