User can select product category when selling product

[stevebrownlee]

Given a user is authenticated And performs a gesture on the Sell a product hyperlink When the product form is rendered Then there should be a dropdown that displays all product categories

Given a user has filled out the product form, but not chosen a category When the user clicks on the Sell button Then the user should be alerted to select a product category

[MidbossK]

User fills out a product form correctly, prompt them to pick category to put it in User doesnt select category, alert them that its required