Wayland: `request_repaint` ignored if minimized

According to @jleibs, calling `ctx.request_repaint` does not result in a call to `App::update` when on Wayland and the app is minimized (Hyprland placed on non-visible workspace).

* See https://github.com/rerun-io/rerun/pull/7422 for more
* We have the same problem on web: https://github.com/emilk/egui/issues/5112
* Related: https://github.com/emilk/egui/issues/5113