zhatuokun

**Describe the bug** The main window is not centered correctly when the scale factor is not 1(my default 1.25). **To Reproduce** Steps to reproduce the behavior: 1. `cargo new example`...

Fix: `Ui::new_child` does not consider the sizing_pass field of `UiBuilder`

1

During the sizing pass we want widgets to use up as little space as possible, but it does not consider the sizing_pass field of `UiBuilder`.

Fix: `Sides` did not apply the layout position correctly.

1

Run this code ```rs CentralPanel::default().show(ctx, |ui| { Sides::new().show( ui, |ui| { ui.label("1"); }, |ui| { ui.label("2"); }, ); Sides::new().show( ui, |ui| { ui.label("11"); }, |ui| { ui.label("22"); }, ); Sides::new().show(...

**Describe the bug** When the `inner_margin` is not set in the `Panel`, the border of the widget inside `Panel::show_inside` is not displayed correctly. **To Reproduce** Run this code ```rs CentralPanel::default().show(ctx,...