Setting UI scale factor according to system pixel density

editor/src/main.rs

@@ -192,7 +192,7 @@ impl Application {
                 let screen_desc = egui_wgpu_backend::ScreenDescriptor {
                     physical_width: self.config.width,
                     physical_height: self.config.height,
-                    scale_factor: 1.0, // TODO ???
+                    scale_factor: self.egui_ctx.pixels_per_point(),
                 };
 
                 self.egui_rp