I want to use shift+down and shift+up to scroll through the preview pane. But gh-dash does not respond to those keys, although bubbletea defines them.

To Reproduce

keybindings:
  universal:
    - key: "shift+down"
      builtin: pageDown
    - key: "shift+up"
      builtin: pageUp

Visit an issue or pr with a larger text in the preview pane and press thos keys. Nothing happens.

Expected behavior
I can use other simple keys like D and U (which is my current workaround), but I'd expect bubbletea key combos to work.

Desktop (please complete the following information):

• OS: Ubuntu 25.04
• gh-dash: v4.16.1, checksum: h1:bWsjVHapSlZChre33870cpKLJUuFB63D330ZCcytYCs=
• Terminal: xfce4-terminal
• WM: swayfx 0.5.2 (based on sway 1.10.1)