Contribs fork

@emreeren
I have added support for followings

1. Added support for  Menu properties/modifiers in a batch mode. It uses '|' (pipe) as a delimiter between name and price.  By default product is left empty. If price is left empty, it will default to 0.00
e.g Strawberry|0.99

2. Add support for products with multiple portion/price in a batch mode. It uses "|" as a delimiter.
e.g
Sundae|Small:0.99|Medium:1.99|Large:2.99
Cone|Small:0.49|Medium:0.99|Large:1.39

3. Added support for scroll bar in SelectedTicketItemsView.xaml which will allow to scroll for properties/modifiers if doesn't fit in the screen. Earlier I had to change the number of columns and height of columns as a work around and still it was not fitting in the screen as I have multiple modifier groups.
e.g Portion, Ice-Cream Flavor, Sundae-Flavor, Extra Toppings

4. Commented out #if DEBUG to avoid recreation of tables.

Please review and merge if make sense.