Linear transformation scene ghost vectors leaves ghosts

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## Description of bug / unexpected behavior
When `leave_ghost_vectors=True` and "show_basis_vectors=False", vectors added to `LinearTransformationScene` will have strange ghosts.

## Expected behavior
No ghosts.

## How to reproduce the issue

```py
class VectorArrow(LinearTransformationScene):
def __init__(self, **kwargs):
LinearTransformationScene.__init__(
self,
leave_ghost_vectors=True,
show_basis_vectors=False
)

def construct(self):
self.add_vector(Arrow(ORIGIN, [1,2,0], stroke_width=2, tip_length=0.2, buff=0))
self.apply_matrix([[1,1],[0,1]])
```

## Additional media files

Images/GIFs

## Logs
Terminal output

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## System specifications

System Details

- OS (with version, e.g Windows 10 v2004 or macOS 10.15 (Catalina)):
- RAM:
- Python version (`python/py/python3 --version`):
- Installed modules (provide output from `pip list`):
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LaTeX details

+ LaTeX distribution (e.g. TeX Live 2020):
+ Installed LaTeX packages:

FFMPEG

Output of `ffmpeg -version`:

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```

## Additional comments

Start with the LinearTransformationScene entry point and reproduce the example using leave_ghost_vectors=True, show_basis_vectors=False, add_vector, and apply_matrix. Trace how the vector and its ghost are created during the transformation; done means the reproduction renders without unintended ghost vectors.

Written by the indexing model from the issue text.