activeHeaderLinks config don't work in alpha release

[oott123]

• I confirm that this is an issue rather than a question.

Bug report

Version

1.0.0-alpha.44

Steps to reproduce

create .vuepress/config.js:

module.exports = {
  themeConfig: {
    activeHeaderLinks: false,
    sidebar: 'auto',
  }
}

and add some docs with headers. Scroll and look at the url. Url is changing regardless of you set it to true or false.

What is expected?

Url is not change when you set activeHeaderLinks to false

What is actually happening?

Url is change when you set it to false

Other relevant information

• Your OS: macOS 10.14.3
• Node.js version: v8.12.0
• Browser version: Google Chrome | 73.0.3683.86
• Is this a global or local install? local
• Which package manager did you use for the install? yarn
• Does this issue occur when all plugins are disabled? actually is the bug in the default theme which enabled @vuepress/plugin-active-header-links by default.

[shigma]

Fixed at #1508.