Focus on Release Notes input not working properly

Summary

When entering content into the Release notes input on the Create a Release page, the input box seems to cut into the input on Google Chrome:

Steps to reproduce

1. Visit the Create a Release page under Deployments -> Releases -> New Release.
2. Focus in on the Release notes input.

What is the current bug behavior?

• The current focus is cutting into the input box.

What is the expected correct behavior?

• The focus should go around the outside of the box as per https://design.gitlab.com/patterns/forms.

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)

Possible fixes

In app/assets/javascripts/releases/components/app_edit_new.vue, the markdown field is on line 216. The div adding the bordered-box class needs to be removed completely, and the common-note-form class needs to be added to the gl-form-group.