fix(ui): Box, Cylinder, Sphere, Torus and Coil dialogs show the unit of their sizes (#630) (#709)

The Box, Cylinder, Sphere, Torus and Coil dialogs now start their sizes in the design's units with the unit written out ("20 mm", "20 in"), like the other dialogs. OK makes the same sizes as before. Fixes #630.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/ui-egui/src/lib.rs

@@ -76,6 +76,8 @@ pub mod prefs;
 #[cfg(test)]
 mod preselect_tests;
 pub mod preview;
+#[cfg(test)]
+mod primitive_units_tests;
 pub mod recovery_ui;
 pub mod ref_images;
 #[cfg(test)]