How to add Spacer() between the tabs?

[qweluke]

New Issue Checklist

• [X] Updated Tabman to the latest version
• [X] I took a look at the Troubleshooting Guide
• [X] I searched for existing GitHub issues

Issue Description

I'd like to:

• put Spacer() between each tab so they fill all of the space
• add left padding before "Today's top 10" so it's not so close to the phone edge
• add right padding before "Search" so it's not so close to the phone edge

  override func viewDidLoad() {
    super.viewDidLoad()

    dataSource = self

    let bar = TMBarView.ButtonBar()

    bar.buttons.customize {
      $0.tintColor = UIColor(Color.theme.accent)
      $0.selectedTintColor = UIColor(Color.theme.accent)
      $0.font = UIFont(name: "ComicSans-Regular", size: 16)!
      $0.selectedFont = UIFont(name: "ComicSans-Regular", size: 16)!

    }

    let systemBar = bar.systemBar();
    systemBar.backgroundStyle = .flat(color: UIColor(Color.red))
    systemBar.separatorColor = .clear

    addBar(systemBar, dataSource: self, at: .top)
  }

[akaakoz]

@qweluke Does adding bar.layout.contentMode = .fit solve your problem?