Regression: bevy_winit now pulls in all of bevy_ui

[brianreavis]

Problem

In #21668, bevy_ui was added as a dependency of bevy_input_focus. Because bevy_input_focus is a dependency of bevy_winit, it's now impossible to use winit without pulling all of bevy_ui.

Bevy version and features

• main since Add Automatic Directional Navigation Graph Generation #21668