Picker Panels

WIP of TradeShift's pickers (https://medium.com/@mibosc/responsive-design-why-and-how-we-ditched-the-good-old-select-element-bc190d62eff5) into a new health app.

Works well on every device at any size in all modern browsers and is a great solution for when you have a lot of user-selectable content and a small amount of space.