choose pagination has no indicators or prev/next since 0.14

[joshbeard]

Describe the bug
gum choose does not properly paginate since 0.14.

• The pagination indicator is no longer displayed
• The left/right navigation no longer works
• The list scrolls, but it's not clear there's additional results in the list

To Reproduce

Run gum choose with a list of several items beyond its height

gum choose {0..9}

gum choose --height=6 {0..9}

Expected behavior
Like versions before 0.14.0, a pagination indicator should be visible or optionally visible and left/right navigation should paginate.

Screenshots

Desktop (please complete the following information):

• OS: Linux
• Version gum version 0.14.0