Merge branch 'ce-improve-admin-licence-page-rest-fe' into 'master'

CE FE Simplify admin instance licenses page

Closes gitlab-ee#7054

See merge request gitlab-org/gitlab-ce!26439

app/assets/stylesheets/framework/variables.scss

@@ -805,3 +805,8 @@ $compare-branches-sticky-header-height: 68px;
  - Issue: https://gitlab.com/gitlab-org/design.gitlab.com/issues/242
  */
 $enable-validation-icons: false;
+
+/*
+Licenses
+*/
+$license-header-cell-width: 150px;