Reordering results columns causes crash and data loss

[johnsaigle]

Hi, I tried out this extension today and was very happy with the results as this tool helped me to successfully confirm a timing-based issue in an application I was testing.

I tried to re-order the columns but doing so caused the extension to freeze and ultimately I had to restart Burp. After I did so, the results of the Timeinator tests were gone.

For context, this occurred in Burp Suite Pro v2021.3.1.