Add another column to the Stock Asset Grid for cost

Description

As an user I want to see the Adjusted Cost to the Stock Asset grid, this is a calculated value

Development tasks

• Added a Notmapped and Browsable property, AdjustedCost, in the StockAsset class. This property is read-only, as in calculated based on the stock's transactions.
• Added code to label the column header as Orig/Adj Cost
• Provide the formula to calculate the value, in the MPSS.Common/Model/StockAsset class, for the AdjustedCost property