Refactor Quantity Selection

[AnthonyWhitakerJr]

Instead of a Stepper, display a popover with a table view for selection of numbers 1 - 10+.

• [x] 1-9 sets quantity to selected number.
• [x] Selecting 10+ changes selection to a text field with a numerical keyboard.
• [x] Hard-code a maximum of 99 for each item; may add an item specific max to product data at a later date.

[AnthonyWhitakerJr]

Also add an update/done button to submit user entered numbers.

[AnthonyWhitakerJr]

Push to version 0.2