Merge branch 'file-content-mobile' into 'master'

Reduce top and bottom margin on file viewer on mobile

See merge request !14114

app/assets/stylesheets/framework/files.scss

@@ -17,8 +17,11 @@
       max-width: $limited-layout-width-sm;
       margin-left: auto;
       margin-right: auto;
-      padding-top: 64px;
-      padding-bottom: 64px;
+
+      @media (min-width: $screen-md-min) {
+        padding-top: 64px;
+        padding-bottom: 64px;
+      }
     }
   }