GraphQL Playground truncates URL input on a "?" character

[FluorescentHallucinogen]

How to reproduce?

Go to https://www.graphqlbin.com or open GraphQL Playground Electron app, enter e.g. https://serve.onegraph.com/dynamic?app_id=1b2b8f9d-f2de-49a7-b5d6-46c313ddc203 and click "Use endpoint"/"Open" button.

The URL becomes https://serve.onegraph.com/dynamic that is not valid anymore.

@OneGraph @dwwoelfel @sgrove @rofrischmann, cc.