erp5_force: break by dropping the custom page template

bt5/erp5_forge/SkinTemplateItem/portal_skins/erp5_vcs/vcs_dialog.xml

-<?xml version="1.0"?>
-<ZopeData>
-  <record id="1" aka="AAAAAAAAAAE=">
-    <pickle>
-      <global name="ZopePageTemplate" module="Products.PageTemplates.ZopePageTemplate"/>
-    </pickle>
-    <pickle>
-      <dictionary>
-        <item>
-            <key> <string>_bind_names</string> </key>
-            <value>
-              <object>
-                <klass>
-                  <global name="NameAssignments" module="Shared.DC.Scripts.Bindings"/>
-                </klass>
-                <tuple/>
-                <state>
-                  <dictionary>
-                    <item>
-                        <key> <string>_asgns</string> </key>
-                        <value>
-                          <dictionary>
-                            <item>
-                                <key> <string>name_subpath</string> </key>
-                                <value> <string>traverse_subpath</string> </value>
-                            </item>
-                          </dictionary>
-                        </value>
-                    </item>
-                  </dictionary>
-                </state>
-              </object>
-            </value>
-        </item>
-        <item>
-            <key> <string>content_type</string> </key>
-            <value> <string>text/html</string> </value>
-        </item>
-        <item>
-            <key> <string>expand</string> </key>
-            <value> <int>0</int> </value>
-        </item>
-        <item>
-            <key> <string>id</string> </key>
-            <value> <string>vcs_dialog</string> </value>
-        </item>
-        <item>
-            <key> <string>output_encoding</string> </key>
-            <value> <string>utf-8</string> </value>
-        </item>
-        <item>
-            <key> <string>title</string> </key>
-            <value> <unicode></unicode> </value>
-        </item>
-      </dictionary>
-    </pickle>
-  </record>
-</ZopeData>

bt5/erp5_forge/SkinTemplateItem/portal_skins/erp5_vcs/vcs_dialog.zpt

-<tal:block xmlns:tal="http://xml.zope.org/namespaces/tal"
-           xmlns:metal="http://xml.zope.org/namespaces/metal"
-           xmlns:i18n="http://xml.zope.org/namespaces/i18n">
-  <tal:block define="local_parameter_list python: dict((x, request[x])
-                       for x in ('added', 'modified', 'removed', 'changelog', 'push')
-                       if x in request);
-                     dummy python: local_parameter_list.update((x, options.pop(x))
-                       for x in ('caller', 'caller_kw')
-                       if x in options)"
-             tal:on-error="structure python: here.BusinessTemplate_handleException(error.value, context.id)">
-    <tal:block metal:use-macro="here/form_dialog/macros/master" />
-  </tal:block>
-</tal:block>
\ No newline at end of file