eframe's `App::persist_egui_memory` doesn't seems to work

**Describe the bug**
i'm trying to use `App::persist_egui_memory` to control if app remembers window position, but it doesn't seems to work. i've tried latest version from crates.io and git main branch.

**To Reproduce**
Steps to reproduce the behavior:
1. Added this code
```rust
impl eframe::App for MyApp {
...
fn persist_egui_memory(&self) -> bool {
self.settings.remember_window_position
}
}
```
2. Changed setting to false
3. Close and reopen app
4. App preserves window position

**Expected behavior**

window should open in roughly the same spot, chosen by system, but different from last position when it was closed. effectively not remembering window position

**Desktop (please complete the following information):**
- OS: Windows 10
- Version

**Additional context**

trying to fix this issue https://github.com/Shadlock0133/music-vibes/issues/18 in my app

Start with eframe's App::persist_egui_memory implementation and reproduce the behavior on Windows 10 using the steps in the issue. Trace how the setting affects persisted window position when the app closes and reopens; done means returning false prevents the previous position from being reused.

Written by the indexing model from the issue text.