Fix invisible window creation on Windows

[aloucks]

Objective

Fixes #18027

Solution

Run redraw_requested logic in about_to_wait on Windows during initial application startup and when in headless mode

Testing

• Ran cargo run --example window_settings to demonstrate invisible window creation worked again and fixes Application started with a hidden window never actually runs #18027
• Ran cargo run --example eased_motion to demonstrate no regression with the fix for WakeUp doesn't unfreeze systems when dragging #17488

Ran all additional window examples.

Notes:

• The transparent_window was not transparent but this appears to have been broken prior to Fix window freezing when dragged or resized on Windows #18004. See: Window transparency broken on Windows #7544

[greeble-dev]

I tested the window_settings example and confirmed it's broken on main and fixed with the PR.

However, I was a bit uncertain if the window was really hidden long enough, so I tried increasing the threshold in window_settings.rs/make_visible from 3 to 10 just to see. This broke the example again :[ - the window never appears.

After adding some debug prints, my guess is that it breaks if the app waits for more frames than the default startup_forced_updates of 5.

Testing the PR unchanged:

INFO bevy_winit::system: Creating new window I am a window! (0v1)
about_to_wait self.startup_forced_updates = 5, headless = false
make_visible frames = 0
about_to_wait self.startup_forced_updates = 4, headless = false
make_visible frames = 1
about_to_wait self.startup_forced_updates = 3, headless = false
make_visible frames = 2
about_to_wait self.startup_forced_updates = 2, headless = false
make_visible frames = 3
make_visible setting window.visible = true
WindowEvent::RedrawRequested self.startup_forced_updates = 1
about_to_wait self.startup_forced_updates = 1, headless = false
make_visible frames = 4
WindowEvent::RedrawRequested self.startup_forced_updates = 0
make_visible frames = 5

Aftering increasing make_visible threshold to 10:

INFO bevy_winit::system: Creating new window I am a window! (0v1)
about_to_wait self.startup_forced_updates = 5, headless = false
make_visible frames = 0
about_to_wait self.startup_forced_updates = 4, headless = false
make_visible frames = 1
about_to_wait self.startup_forced_updates = 3, headless = false
make_visible frames = 2
about_to_wait self.startup_forced_updates = 2, headless = false
make_visible frames = 3
about_to_wait self.startup_forced_updates = 1, headless = false
make_visible frames = 4
about_to_wait self.startup_forced_updates = 0, headless = false
about_to_wait self.startup_forced_updates = 0, headless = false
about_to_wait self.startup_forced_updates = 0, headless = false
...repeats forever...

If I then increase startup_forced_updates so it's well above the threshold then the example works again.

SystemInfo { os: "Windows 10 Pro", kernel: "19045" }

[aloucks]

I've added another check to explicitly look for when all windows are invisible. There is some other logic that is driving the update loop based on the visibility status and it has a bunch cfg guards around it. The winnit docs suggest not to drive logic from that status (which is noted in comment in the cfg guards). I didn't want to to attempt to make changes in that area in fear that it might cause some other issue.

[greeble-dev]

Latest version fixes the issues I had. Tested with various delays in window_settings.