Fix box selection erroneously including zero-length handles; fix GRS failing on sharp points (#2550)

* Fixed box selection selecting zero length handles

* Fix GRS for sharp points

* Apply suggestions from code review

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

editor/src/messages/tool/common_functionality/shape_editor.rs

@@ -1444,7 +1444,14 @@ impl ShapeState {
 					if select {
 						match selection_change {
 							SelectionChange::Shrink => state.deselect_point(id),
-							_ => state.select_point(id),
+							_ => {
+								// Select only the handles which are of nonzero length
+								if let Some(handle) = id.as_handle() {
+									if handle.length(&vector_data) > 0. {
+										state.select_point(id)
+									}
+								}
+							}
 						}
 					}
 				}

editor/src/messages/tool/transform_layer/transform_layer_message_handler.rs

@@ -403,9 +403,12 @@ impl MessageHandler<TransformLayerMessage, TransformData<'_>> for TransformLayer
 							let handle1_length = handle1.length(&vector_data);
 							let handle2_length = handle2.length(&vector_data);
 
-							if (handle1_length == 0. && handle2_length == 0.) || (handle1_length == f64::MAX && handle2_length == f64::MAX) {
+							if (handle1_length == 0. && handle2_length == 0. && !using_select_tool) || (handle1_length == f64::MAX && handle2_length == f64::MAX && !using_select_tool) {
-								selected.original_transforms.clear();
+								// G should work for this point but not R and S
-								return;
+								if matches!(transform_type, TransformType::Rotate | TransformType::Scale) {
+									selected.original_transforms.clear();
+									return;
+								}
 							}
 						}
 					} else {