Introduce a new script to get the workflow states for a given portal type

The new approach is a script named ERP5Site_getWorkflowStateItemList that receives the portal type and the state variable (simulation_state/validation_state) as parameters and it will returns the states for the workflow chained to the portal type. This way all the standard dialogs works out of the box even if you customize a workflow chain
get the workflow state var from workflow configuration

instead of guessing its name
fix manual edition of xml
Define a scriptable key for translated_title
Display translated title of accounts in the module
column of account module is now translated_title
Listbox: fix the way to get a property on document

The use of getProperty with a default value was wrong because it does not
display anything if the property is not set and fallbacks to acquisition.
Update test that was wrong

If a listbox show objects with a getQuantity method using a column named
"quantity", this columns must contain 0.0, which is the default value of
getQuantity method.