Merge branch 'bug/jschatz1/file-browser-lines' into 'master'

Bug/jschatz1/file browser lines

Fixes #12725 

![Screen_Shot_2016-01-26_at_11.19.39_AM](/uploads/c5f5a143926600e02de4cfc0687ed8dd/Screen_Shot_2016-01-26_at_11.19.39_AM.png)


See merge request !2615

app/assets/stylesheets/framework/files.scss

@@ -7,6 +7,7 @@
   border: 1px solid $border-color;
 
   &.readme-holder {
+    margin-top: 10px;
     border-bottom: 0;
   }
 

app/assets/stylesheets/framework/tables.scss

@@ -38,7 +38,7 @@ table {
 
       td {
         border-color: $table-border-color;
-        border-bottom: 1px solid;
+        border-bottom: 1px solid $border-color;
       }
     }
   }

app/assets/stylesheets/pages/tree.scss

@@ -22,8 +22,6 @@
       &:hover {
         td {
           background: $hover;
-          border-top: 1px solid #ADF;
-          border-bottom: 1px solid #ADF;
         }
         cursor: pointer;
       }