bug when load dataframe in pandastable

[Adarsh-365]

here is code
```
from tkinter import *
import pandas as pd
from pandastable import Table, TableModel, config
import Load_Dataframe
import numpy as np
class TestApp(Frame):
"""Basic test frame for the table"""
def init(self, parent=None):
self.parent = parent
Frame.init(self)
self.main = self.master
self.main.geometry('600x400+200+100')
self.main.title('Table app')
f = Frame(self.main)
f.pack(fill=BOTH,expand=1)
df = TableModel.getSampleData()
df = pd.DataFrame(
{
"A": 1.0,
"B": pd.Timestamp("20130102"),
"C": pd.Series(1, index=list(range(4)), dtype="float32"),
"D": np.array([3] * 4, dtype="int32"),
"E": pd.Categorical(["test", "train", "test", "train"]),
"F": "foo",
}
)

        self.table = pt = Table(f, dataframe=df,
                                showtoolbar=False, showstatusbar=False)
        pt.show()
      
        pt.show()
        return

          app = TestApp()
          #launch the app
          app.mainloop()

![Screenshot (68)](https://github.com/dmnfarrell/pandastable/assets/102159256/e5271101-7d6b-48f8-8eed-e630d46b6a45)
![Screenshot (67)](https://github.com/dmnfarrell/pandastable/assets/102159256/8d8c617f-692d-4b2d-9974-719a683eb4e4)
can any one tell me why this happening when i traverse data use arrow key from bottom to top

[dmnfarrell]

It's a rendering bug that was never fixed. It shouldn't otherwise alter the functionality of the table.