Add a default for saveBeforeStart setting

All you have to do is add:

"configurationDefaults": {
      "[powershell]": {
        "debug.saveBeforeStart": "nonUntitledEditorsInActiveGroup"
      }
    },

under contributes in the package.json.

here’s an example: https://github.com/microsoft/vscode/blob/bce4d71f648a963cad905ee0ecc7b353ddd3f199/extensions/markdown-language-features/package.json#L311

Then Untitled file debugging will no longer prompt to save 😃

Note: VS Code made this setting “language-aware” literally today. So this will work starting with tomorrow’s insider build. There’s no downside of this being set for those folks on older versions of VS Code so this change can really go in whenever.

cc @isidorn

[isidorn]

Thanks for doing this PR. There was an issue on the VS Code side that I tackled via https://github.com/microsoft/vscode/commit/779f9876bc0a29fa2cfd811e5c613e05c5ec8e21

So now it should work. I tried it out. You can verify with vscode insiders from Monday. Thanks a lot 👏

[TylerLeonhardt]

This is a better solution than the other 😃