Warning when starting extension debugging with pwa- prefix

[alexr00]

Testing microsoft/vscode#89393 on Windows

The first time I ran the launch config for extension debugging I got this warning in the Extension Development window that opened. That is the only window I saw the warning in.

"[c:\Users\alros.vscode-insiders\extensions\ms-vscode.js-debug-nightly-2020.1.38943]: Overwriting extension c:\Program Files\Microsoft VS Code Insiders\resources\app\extensions\ms-vscode.js-debug-nightly with c:\Users\alros.vscode-insiders\extensions\ms-vscode.js-debug-nightly-2020.1.38943."

[connor4312]

I think this may be because for one version of insiders we used latest as the version number of the built-in extension js-debug-nightly. This seems to have caused an assortment of negative side effects, this may be one. This has since been fixed, I'll close the issue unless it appears to be persistent.