Testing microsoft/vscode#274805

The URL format is very cumbersome: vscode-insiders://github.vscode-pull-request-github/checkout-pull-request?%7B%22owner%22%3A%22microsoft%22%2C%22repo%22%3A%22vscode-css-languageservice%22%2C%22pullRequestNumber%22%3A460%7D

Why not something like vscode-insiders://github.vscode-pull-request-github/checkout-pull-request?uri=https://github.com/microsoft/vscode-css-languageservice/pull/460 ?