Fix 3D polyline behavior and properties

src/app/properties.rs

@@ -121,6 +121,9 @@ impl OpenCADStudio {
                 .and_then(|entity| match entity {
                     acadrust::EntityType::LwPolyline(polyline) => Some(polyline.vertices.len()),
                     acadrust::EntityType::Polyline2D(polyline) => Some(polyline.vertices.len()),
+                    acadrust::EntityType::Polyline3D(polyline) => Some(
+                        crate::entities::polyline::polyline3d_control_vertex_count(polyline),
+                    ),
                     acadrust::EntityType::Leader(leader) => Some(leader.vertices.len()),
                     acadrust::EntityType::Spline(spline) => {
                         Some(if crate::entities::spline::shows_fit_points(spline) {

src/app/update/mod.rs

@@ -4901,6 +4901,9 @@ impl OpenCADStudio {
                     match self.tabs[i].scene.document.get_entity(handles[0]) {
                         Some(acadrust::EntityType::LwPolyline(p)) => p.vertices.len(),
                         Some(acadrust::EntityType::Polyline2D(p)) => p.vertices.len(),
+                        Some(acadrust::EntityType::Polyline3D(p)) => {
+                            crate::entities::polyline::polyline3d_control_vertex_count(p)
+                        }
                         Some(acadrust::EntityType::Table(table)) => {
                             table.row_count().saturating_mul(table.column_count())
                         }

src/app/view/mod.rs

@@ -432,6 +432,7 @@ impl OpenCADStudio {
                             let indexed = match tab.scene.document.get_entity(h) {
                                 Some(acadrust::EntityType::LwPolyline(_))
                                 | Some(acadrust::EntityType::Polyline2D(_))
+                                | Some(acadrust::EntityType::Polyline3D(_))
                                 | Some(acadrust::EntityType::Spline(_)) => true,
                                 _ => false,
                             };