Remove new polygon button in 3d view

src/main.rs

@@ -83,6 +83,7 @@ fn update_ui_side_panel(
                 }
             }
 
+            if global_state.view_2d {
                 if global_state.polygon_started {
                     if let Some(polygon) = object_infos.active_polygon() {
                         for (index, point) in polygon.points().iter().enumerate() {
@@ -94,6 +95,7 @@ fn update_ui_side_panel(
                         global_state.polygon_started = true;
                     }
                 }
+            }
         });
 }