Cannot resize main window using mouse

[JoshLambda]

Thanks for the very useful crate that bevy_egui is.

Trying to resize window using mouse doesn't work, as confirmed using example simple.rs.
When putting mouse cursor near a window edge, the cursor doesn't change into resizing style (thin double arrow cursor) and there is no way to resize the window.

Versions (current):
bevy = "0.8.1"
bevy_egui = "0.16.1"

Without bevy_egui this simple example works:

use bevy::prelude::*;

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .run();
}

When adding bevy_egui resizing window with mouse doesn't work anymore:

use bevy::prelude::*;
use bevy_egui::EguiPlugin;

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_plugin(EguiPlugin)
        .run();
}

By default, for bevy WinitSettings the value for focused_ mode is UpdateMode::Continuous which is needed for games, and we can observe the problem that the cursor doesn't change to resizing style when near window edges.

And when we change focused_mode to UpdateMode::Reactive, with adding:

.insert_resource(WinitSettings {
   focused_mode: UpdateMode::Reactive {
       max_wait: std::time::Duration::from_secs(1),
   },
   ..Default::default()
})

... the cursor at first correctly switches to resize style when nearing window edge, but then reverts to arrow within less than a second, which matches the 1 second wake up delay set with UpdateMode::Reactive above.

So apparently the resize action is cancelled when bevy wakes up, or more probably at each beginning of its cycle (as witnessed with UpdateMode::Continuous). I couldn't find where exactly though.

[vladbat00]

It seems that #128 fixes the issue. But if the problem still persists, feel free to comment here (I'll re-open the issue then) or open a new one.

[JoshLambda]

I confirm it now works properly on my end. Thank you and @chronicl for the fix!