Improve the context menu of the history table

• Revisit the context menu of the history table.
• It should contains the action new event, split event and close event.
• Keep the action update, duplicate and destroy.
• The action split is a wizard. It request the end_date. It closes the select event by the end_date, duplicate it with the start_date equal to end_date + 1 day and allow the user to update the other field.
• The action close event is also a wizard requesting only the end_date.