edit form fixed to highlight sku as required if sent in as blank (ie. when sku isn't aligning to any mas_products) and also made the option of -unassigned- in the dropdown only show if unassigned currently.
edit form fixed to highlight sku as required if sent in as blank (ie. when sku isn't aligning to any mas_products) and also made the option of -unassigned- in the dropdown only show if unassigned currently.

markalinn/Spree-InSynch-Integration,markalinn/Spree-InSynch-Integration