Fix language id

[aeschli]

The VS code built-in powershell extension has a language contribution that looks like that

        "languages": [{
            "id": "powershell",
            "extensions": [ ".ps1", ".psm1", ".psd1" ],
            "aliases": [ "PowerShell", "powershell", "ps", "ps1" ],
            "configuration": "./powershell.configuration.json"
        }],

The powershell extension however uses "id": "PowerShell"
This results in two 'Powershell' entries in the language selector drop down.

As long as we have the built-in powershell support, the powershell extension should use the same id, and ideally not contribute the language and grammar contribution but instead add a dependency on the built-in extension:

 "extensionDependencies": [
        "vscode.powershell"
    ],

This will make sure the built-in extension is loaded.

Please file an issue for any changes you'd like us to do the built-in contributes section (such as adding more file extension) or the grammar. Of course a pull request would even be easier.

[msftclas]

Hi @aeschli, I'm your friendly neighborhood Microsoft Pull Request Bot (You can call me MSBOT). Thanks for your contribution!

It looks like you're a Microsoft contributor (Martin Aeschlimann). If you're full-time, we DON'T require a Contribution License Agreement. If you are a vendor, please DO sign the electronic Contribution License Agreement. It will take 2 minutes and there's no faxing! https://cla.microsoft.com.

TTYL, MSBOT;

[daviwil]

You are awesome, thank you! In the future I'll send pull requests for the basic in-box PS functionality. I'm happy to do things that way.