Made toc Sidebar Expand to Fit Page, per issue #744 by yurishkuro

[Donovan-Porter]

As per issue #744, opened by yurishkuro, I made the sidebar expand to fill the page.

Which problem is this PR solving?

• Resolved #744

Description of the changes

• Two lines in "./documentation/themes/jaeger-docs/assets/sass/toc.sass"
• css attribute "height" added to "toc" class.
• css attribute "position" added to "jaeger-toc-page-list" class

How was this change tested?

• Local development environment utilizing hugo server.

Checklist

• [x] I have read https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
• [x] I have signed all commits
• [ ] I have added unit tests for the new functionality
• [ ] I have run lint and test steps successfully
  • for jaeger: make lint test
  • for jaeger-ui: yarn lint and yarn test

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[yurishkuro]

I see it now expands to more than the height of the page.

[Donovan-Porter]

Yes, I figured it doesn't much matter because of the ample whitespace, but the height could be finetuned. I used 6rem because that's the value of the "$navbar-height" in the "variables.sass" file, but the sidebar's top is below 6rem from the top of the window. I also couldn't seem to get the $navbar-height variable to read properly in the calc() function.

Another issue that I didn't catch before submitting the pull request is the doubled scroll bar.