Fix being able to scroll completely to the bottom of the nav

Author: chasenlehara

static/layout.less

@@ -69,6 +69,8 @@
   flex-grow: 1;
   background: white;
   height: inherit;
+  overflow-x: hidden;
+  overflow-y: auto;
 }
 .bottom-right {
   flex-grow: 1;

static/sidebar.less

@@ -79,11 +79,11 @@ img.social-icon-small{
 		color: darken(@link-color,10%);
 	}
 	// Highest parent level
-	.nav-menu { 
+	.nav-menu {
 		height: inherit;
 		overflow-y: auto;
 		& > .scrollable-contents {
-			padding: @gutter*2;
+			padding: @gutter * 2 @gutter * 2 0;
 			& > ul {
 				padding: 0;
 				height: inherit;