gpui: Do not panic when `GetMonitorInfoW` fails (#43397)

Fixes ZED-29R

Release Notes:

- N/A *or* Added/Fixed/Improved ...
f6f8fc1229Lukas Wirth committed on 11/24/2025, 1:35:24 PM· committed by GitHubparent2d55c08
2 files changedLine totals unavailable