[graphql-playground-electron] beautify the scroll bar

[Lizhooh]

This issue pertains to the following package(s):

• GraphQL Playground - Electron App

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

win7

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

v1.6.0

What is the expected behavior?

Win7's default scroll bar does not look good, I hope to beautify the scroll bar style.

[huv1k]

Can you please provide a screenshot? :)

[Lizhooh]

@HuVik Hi,

1. The scroll bar is displayed when the contents of the container are not full, and the display is inconsistent. You can use overflow-y: auto to fix.

2. On the right is the effect of opening the developer tools to try to beautify the scroll bar.(use ::-webkit-scrollbar)

[huv1k]

@Lizhooh Can you make please PR for it? :) It would help a lot <3

[Lizhooh]

@HuVik I try to submit a PR for this, please wait.

[corstian]

While you're at it, did you take a look at the horizontal scrollbar for the tabs, too? That's a real monstrosity ;)