Style drive splitter

customize.dist/src/less2/include/drive.less

@@ -479,7 +479,16 @@
             top: 0;
             left: 0;
             cursor: col-resize;
-            background: red;
+            display: flex;
+            align-items: center;
+            justify-content: flex-end;
+            &:hover {
+                border-left: 1px solid @cryptpad_text_col;
+            }
+            i {
+                color: @cryptpad_text_col;
+                font-size: 1.6rem;
+            }
         }
     }
     #cp-app-drive-content {

www/common/drive-ui.js

@@ -637,7 +637,9 @@ define([
         var $trashContextMenu = $("#cp-app-drive-context-trash");
 
 
-        var splitter = h('div.cp-splitter');
+        var splitter = h('div.cp-splitter', [
+            h('i.fa.fa-ellipsis-v')
+        ]);
         $contentContainer.append(splitter);
         APP.$splitter = $(splitter).on('mousedown', function (e) {
             e.preventDefault();