Language pack install via Configure Display Language command broken

[msujew]

Bug Description:

After #13421 the arguments of the VSCodeExtensionUri.fromId method has changed without adapting the caller site. This results in an invalid URI that doesn't lead to a valid extension.

Steps to Reproduce:

1. Run the Configure Display Language command
2. Select a language that isn't installed yet.
3. Observe the error message in the console: Uncaught (in promise) Error: Deployment of extension with ID vscode-extension://vscode-language-pack-zh-hans/MS-CEINTL failed.

Additional Information

• Operating System: All
• Theia Version: Every commit after Introduce '--install-plugin' cli command. #13421

[tsmaeder]

The URI that is being requested is https://open-vsx.org/api/-/query?extensionId=vscode-language-pack-de&extensionVersion=MS-CEINTL&includeAllVersions=true. You get a 400 error on this uri. Note that the uri is not correct.