Fixed issue with active nav-stacked background

build/less/navs.less

@@ -43,6 +43,8 @@
   }
   > li.active > a,
   > li.active > a:hover {
+    background: transparent;
+    color: #444;
     border-top: 0;
     border-left-color: @light-blue;
   }

dist/css/AdminLTE.css

@@ -2376,6 +2376,8 @@ a:focus {
 }
 .nav-stacked > li.active > a,
 .nav-stacked > li.active > a:hover {
+  background: transparent;
+  color: #444;
   border-top: 0;
   border-left-color: #3c8dbc;
 }