Footer message covers actual site content

Summary

When the Footer message feature is configured and in use it will cover other site information. This can best be described with a screenshot of it in action on the epic roadmap page in the screenshots section.

Steps to reproduce

Configure a footer message and then go to a page that has data near the bottom of the page.

What is the current bug behavior?

Covers other information being displayed on the page

What is the expected correct behavior?

See both the footer message and the content of the page.

Relevant logs and/or screenshots

footercovering

Output of checks

(If you are reporting a bug on GitLab.com, write: This bug happens on GitLab.com)

Results of GitLab environment info

Expand for output related to GitLab environment info 
System information
System:
Proxy:          no
Current User:   git
Using RVM:      no
Ruby Version:   2.5.3p105
Gem Version:    2.7.6
Bundler Version:1.16.6
Rake Version:   12.3.2
Redis Version:  3.2.12
Git Version:    2.18.1
Sidekiq Version:5.2.3
Go Version:     unknown


GitLab information
Version:        11.7.0-ee
Revision:       c02f0d4
Directory:      /opt/gitlab/embedded/service/gitlab-rails
DB Adapter:     postgresql
DB Version:     9.6.11
URL:            https://
HTTP Clone URL: https:///some-group/some-project.git
SSH Clone URL:  git@:some-group/some-project.git
Elasticsearch:  no
Geo:            no
Using LDAP:     yes
Using Omniauth: yes
Omniauth Providers:


GitLab Shell
Version:        8.4.4
Repository storage paths:
  • default: /var/opt/gitlab/git-data/repositories Hooks: /opt/gitlab/embedded/service/gitlab-shell/hooks Git: /opt/gitlab/embedded/bin/git