Windows Terminal version (or Windows build number)

Windows Terminal Preview 1.9.1445.0 on Windows 10.0.19043.1052

Other Software

N/A

Steps to reproduce

1. Select the light theme in Windows settings (Personalization, Colors).
2. Start Windows Terminal Preview.
3. Open the Settings tab.
4. Close the session tab. (Only to exclude it from screen shots.)
5. Select the Actions page of the Settings tab.
6. Press the Tab key a few times, to select one of the actions listed.

Expected Behavior

Should have a pencil icon at the right side of the description of the key binding.

The pencil icon would show up all right with a dark theme:

Actual Behavior

No pencil icon is visible, but if you press Tab once more, the focus rectangle moves to the invisible pencil icon anyway.