NEUROP-1227

• Create a settings in system admin settings to create an adjustment message valid for each companies if the system invoice have been marked as adjustment (right now valid only for custom situation via script)
• Added field in system_invoice table to write a description (via database only). This description have the priority over system admin adjustment message
• Important: These messages have no translations because are custom messages, so they will be shown exactly how they have been written independent by the language. These messages will be shown only if the system invoice is marked as ‘adjustment’. If not have system settings and no system invoice description, nothing will be shown