Supplier, Stocks, Items, Item Kits and Inventory Form

Stocks
- Changes of the Data Display Grid View as per scd892 requested.
- Changes of the Colors of the DatagridView
Items, Suppliers, Items, Item Kits
- Changes of the Colors of the DatagridView
Inventory Form (Parent)
- Added Codes to Call Item Kits

Item Kits
- Datagrid has been binded. But still going to implement since some
functions are partial.