Top tap scrollbar not showed.

[wahello]

This issue pertains to the following package(s):

• GraphQL Playground - Electron App
• GraphQL Playground HTML
• GraphQL Playground
• GraphQL Playground Express Middleware
• GraphQL Playground Hapi Middleware
• GraphQL Playground Koa Middleware
• GraphQL Playground Lambda Middleware

Mac osx 10.13.5 top tab scrollbar is not showed.

1.6.2

Top tab scrollbar not show when there are many tabs.