Fix 2D bone weight editor not accounting for offset

Skeleton was shown in wrong place in Polygon2D UV editor's bone painting mode.

editor/plugins/polygon_2d_editor_plugin.cpp

@@ -1170,7 +1170,7 @@ void Polygon2DEditor::_uv_draw() {
 
 						found_child = true;
 
-						Transform2D bone_xform = node->get_global_transform().affine_inverse() * (skeleton->get_global_transform() * bone->get_skeleton_rest());
+						Transform2D bone_xform = node->get_global_transform().affine_inverse().translated(-node->get_offset()) * (skeleton->get_global_transform() * bone->get_skeleton_rest());
 						Transform2D endpoint_xform = bone_xform * n->get_transform();
 
 						Color color = current ? Color(1, 1, 1) : Color(0.5, 0.5, 0.5);
@@ -1180,7 +1180,7 @@ void Polygon2DEditor::_uv_draw() {
 
 					if (!found_child) {
 						//draw normally
-						Transform2D bone_xform = node->get_global_transform().affine_inverse() * (skeleton->get_global_transform() * bone->get_skeleton_rest());
+						Transform2D bone_xform = node->get_global_transform().affine_inverse().translated(-node->get_offset()) * (skeleton->get_global_transform() * bone->get_skeleton_rest());
 						Transform2D endpoint_xform = bone_xform * Transform2D(0, Vector2(bone->get_length(), 0));
 
 						Color color = current ? Color(1, 1, 1) : Color(0.5, 0.5, 0.5);