Merge branch 'issue_13987' into 'master'

Fixes broken layout of web editor page on mobile

Fixes #13987 

<p><img src="https://gitlab.com/gitlab-org/gitlab-ce/uploads/3a58e7b576c25d5929bc1cdcbe163161/Screen_Shot_2016-03-10_at_1.13.19_PM.png" alt="Screen_Shot_2016-03-10_at_1.13.19_PM" width="487"></p>

See merge request !3167

app/assets/stylesheets/framework/files.scss

@@ -169,6 +169,7 @@
      */
     &.code {
       padding: 0;
+      -webkit-overflow-scrolling: auto; // See https://gitlab.com/gitlab-org/gitlab-ce/issues/13987
     }
   }
 }

app/assets/stylesheets/pages/commit.scss

@@ -90,6 +90,7 @@
   position: relative;
   font-family: $monospace_font;
   $left: 12px;
+  overflow: hidden; // See https://gitlab.com/gitlab-org/gitlab-ce/issues/13987
   .max-width-marker {
     width: 72ch;
     color: rgba(0, 0, 0, 0.0);