Resolve #2774071 "Fix coding standard"

Closes #2774071

css/jquery.treetable.css

@@ -3,19 +3,16 @@ table.treetable span.indenter {
   margin: 0;
   padding: 0;
   text-align: right;
-
   /* Disable text selection of nodes (for better D&D UX) */
   user-select: none;
   -khtml-user-select: none;
   -moz-user-select: none;
   -o-user-select: none;
   -webkit-user-select: none;
-
   /* Force content-box box model for indenter (Bootstrap compatibility) */
   -webkit-box-sizing: content-box;
   -moz-box-sizing: content-box;
   box-sizing: content-box;
-
   width: 19px;
 }