Add option to rename tabs programmatically

[BrunoScheufler]

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

What OS and OS version are you experiencing the issue(s) on?

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What version of graphql-playground(-electron/-middleware) are you experiencing the issue(s) on?

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What is the expected behavior?

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What is the actual behavior?

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What steps may we take to reproduce the behavior?

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I'd love to see the feature for adding preset names to tabs. This could be easily solved by

1. Adding a name prop to the Tab interface
2. Letting the session use this name prop when using makeStateFromTabs