This PR changes the motion path appearance by using the `Vertex` color as defined in the 3D viewport theme settings instead of hardcoding it to white. The issue with setting it to white is that it is too visually distracting, overshadowing the points that are keyframes, which are drawn in the selection color for vertices (also defined in the Theme) Pull Request: https://projects.blender.org/blender/blender/pulls/119382