fixes to main menu

public/less/admin/admin.less

@@ -40,7 +40,7 @@
 		overflow-y: auto;
 
 		.nano-content {
-			top: 13px;
+			top: 51px !important;
 		}
 
 		.sidebar-nav {

public/src/forum/admin/footer.js

@@ -33,6 +33,9 @@ define('forum/admin/footer', ['forum/admin/settings'], function(Settings) {
 	function setupMainMenu() {
 		$('.sidebar-nav .nav-header').on('click', function() {
 			$(this).parents('.sidebar-nav').toggleClass('open');
+			setTimeout(function() {
+				$('.nano').nanoScroller();
+			}, 500); // replace with animationend event
 		});
 
 		$('.nano').nanoScroller();