Revert `mergin-top` removal

app/assets/stylesheets/pages/ee_start_trial.scss

@@ -52,6 +52,8 @@
 @media (max-width: $screen-md-min) {
   .start-trial-body {
     .feature-item-description {
+      margin-top: 15px;
+
       h4,
       p {
         text-align: center;

app/views/admin/trials/new.html.haml

@@ -11,7 +11,7 @@
           %li.row
             .col-md-4
               = custom_icon("ee_ldap_sync")
-            .col-md-8.prepend-top-15.feature-item-description
+            .col-md-8.feature-item-description
               %h4 LDAP Group Sync
               %p
                 Automatically sync groups and manage SSH-keys, permissions,
@@ -19,14 +19,14 @@
           %li.row
             .col-md-4
               = custom_icon("ee_mr_approvals")
-            .col-md-8.prepend-top-15.feature-item-description
+            .col-md-8.feature-item-description
               %h4 Merge Request Approval
               %p
                 Make sure every merge request is approved by one or more people.
           %li.row
             .col-md-4
               = custom_icon("ee_audit_events")
-            .col-md-8.prepend-top-15.feature-item-description
+            .col-md-8.feature-item-description
               %h4 Project Audit Events
               %p
                 View any modifications made within the GitLab server in an
@@ -34,7 +34,7 @@
           %li.row
             .col-md-4
               = custom_icon("ee_file_locking")
-            .col-md-8.prepend-top-15.feature-item-description
+            .col-md-8.feature-item-description
               %h4 File Locking
               %p
                 Scan or modify the code to meet your security and development needs.