POS Improvements for Taxes, Characters Limits and Cash Drawer

In an effort to continually improve our Point of Sale experience, we have implemented 3 adjustments: 

• We have adjusted the UI so if you're using Custom Tax 3, the number displayed will match the accurate calculation of tax on the order 
• When entering a POS Title for a product in the Admin Panel with more than 50 characters, saving your edits will no longer result in an error
• When refunding an order that is not cash, the cash drawer will no longer open automatically, and will only open for cash sales/refunds