New navigation scroll to comment anchors are too high

Summary

The addition of the breadcrumbs has added more vertical space in the new navigation.

Steps to reproduce

Click any link to a comment. Try this one.
Notice that the full top of the comment is not on the screen.

What is the current bug behavior?

Issue comment:

MR comment:

What is the expected correct behavior?

It should be able to handle primary comments and thread comments and have to the top of the content area:

The whole top of the comment should be visible:

Relevant logs and/or screenshots

Output of checks

Results of GitLab environment info

Expand for output related to GitLab environment info


(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:env:info`)

(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production`)

Results of GitLab application Check

Expand for output related to the GitLab application check

(For installations with omnibus-gitlab package run and paste the output of:
sudo gitlab-rake gitlab:check SANITIZE=true)
(For installations from source run and paste the output of:
sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true)
(we will only investigate if the tests are passing)