erp5_core: always use the code editor for editing Python Script

The default value of the field was calling Base_getEditorFieldPreferredTextEditor and returned the preferred text editor, because this script assumes the content type to be text/html by default

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/PythonScript_view/my_body.xml

@@ -11,6 +11,7 @@
             <value>
               <list>
                 <string>description</string>
+                <string>renderjs_extra</string>
                 <string>title</string>
               </list>
             </value>
@@ -69,6 +70,12 @@
                     <key> <string>height</string> </key>
                     <value> <string></string> </value>
                 </item>
+                <item>
+                    <key> <string>renderjs_extra</string> </key>
+                    <value>
+                      <persistent> <string encoding="base64">AAAAAAAAAAI=</string> </persistent>
+                    </value>
+                </item>
                 <item>
                     <key> <string>target</string> </key>
                     <value> <string></string> </value>
@@ -100,6 +107,12 @@
                     <key> <string>height</string> </key>
                     <value> <int>40</int> </value>
                 </item>
+                <item>
+                    <key> <string>renderjs_extra</string> </key>
+                    <value>
+                      <list/>
+                    </value>
+                </item>
                 <item>
                     <key> <string>target</string> </key>
                     <value> <string>Click to edit the target</string> </value>
@@ -114,4 +127,17 @@
       </dictionary>
     </pickle>
   </record>
+  <record id="2" aka="AAAAAAAAAAI=">
+    <pickle>
+      <global name="TALESMethod" module="Products.Formulator.TALESField"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>_text</string> </key>
+            <value> <string>python: [(\'editor\', context.getPortalObject().portal_preferences.getPreferredSourceCodeEditor(\'text_area\')), (\'portal_type\', context.getPortalType()), (\'maximize\', \'listbox\' not in field.id), (\'content_type\', context.getProperty(\'content_type\'))]</string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
 </ZopeData>