Ensure that notify observations are sent during `Window::draw()` (#4236)

This PR fixes a bug in GPUI where the observation API would not be
triggered if a focus event caused a `notify()`

Release Notes:

- N/A
1aa02ac4b6Mikayla Maki committed on 1/24/2024, 4:17:34 AM· committed by GitHubparentsab3aba98336300
2 files changedLine totals unavailable