Merge branch 'fix/profile-settings-content-width' into 'master'

Adjust content width for User Settings, GPG Keys

See merge request gitlab-org/gitlab-ce!16093

app/views/profiles/gpg_keys/index.html.haml

 - page_title "GPG Keys"
+- @content_class = "limit-container-width" unless fluid_layout
 = render 'profiles/head'
 
 .row.prepend-top-default

changelogs/unreleased/fix-profile-settings-content-width.yml

+---
+title: Adjust content width for User Settings, GPG Keys
+merge_request: 16093
+author: George Tsiolis
+type: fixed