Add border to file tree 'sub-items' and add padding to 'item-file'

Author: lng2020

web_src/js/components/DiffFileTreeItem.vue

@@ -59,10 +59,13 @@ a, a:hover {
 
 .sub-items {
   padding-left: 9px;
+  margin-left: 9px;
+  border-left: 1px solid #808080;
 }
 
 .item-file {
   margin-left: 20px;
+  margin-top: 2px;
 }
 
 .item-file.selected {