Feature request: app-wide customization

[rostopira]

Add static shared property, to change default style app-wide
Good example, is default iOS components, like UITableViewCell.appearance() and libraries like ToastSwift:

        var toastStyle = ToastStyle()
        toastStyle.backgroundColor = UIColor.init(white: 0, alpha: 0.5)
        ToastManager.shared.style = toastStyle

[Minitour]

You can now use the DialogDefaults struct for global configuration.