set False as default value of pre_converted_only

because document are only pre converted if erp5_dms_conversion_catalog is installed

product/ERP5/bootstrap/erp5_property_sheets/PropertySheetTemplateItem/portal_property_sheets/DocumentPreference/preferred_pre_converted_only_property.xml

@@ -53,7 +53,7 @@
         </item>
         <item>
             <key> <string>property_default</string> </key>
-            <value> <string>python: True</string> </value>
+            <value> <string>python: False</string> </value>
         </item>
         <item>
             <key> <string>write_permission</string> </key>

product/ERP5/bootstrap/erp5_property_sheets/bt/revision

-55
\ No newline at end of file
+56
\ No newline at end of file