Initial SwiftUI version

Completely re-written using SwiftUI

• Changed the displayed rows

A bit simpler than the original version, I haven't figured out how to scroll the list after adding new items.

Swift 5 and Xcode 10.2

Update the code for Swift 5 and Xcode 10.2

Modernise Code and UI

The way I write code evolves, so I suppose this project should too.

5.0: Modernise project

Update for Xcode 10 and iOS 12.

This doesn't change code, but modernises the Project.