Update to add expand and collapse toggle for TOC, keep showing second level TOC if there is only one first level TOC

Author: jackycute

public/css/extra.css

@@ -154,6 +154,14 @@
     color: #767676;
 }
 
+.ui-toc-dropdown .toc.expand ul {
+    display: block;
+}
+
+.ui-toc-dropdown .nav > li:first-child:nth-last-child(1) > ul {
+    display: block;
+}
+
 .ui-toc-dropdown .nav>li>a:focus,.ui-toc-dropdown .nav>li>a:hover {
     padding-left: 19px;
     color: black;
@@ -281,7 +289,7 @@
     overflow: auto;
 }
 
-.back-to-top, .go-to-bottom {
+.expand-toggle, .back-to-top, .go-to-bottom {
     display: block;
     padding: 4px 10px;
     margin-top: 10px;
@@ -291,12 +299,12 @@
     color: #999;
 }
 
-.back-to-top:hover, .back-to-top:focus, .go-to-bottom:hover, .go-to-bottom:focus {
+.expand-toggle:hover, .expand-toggle:focus, .back-to-top:hover, .back-to-top:focus, .go-to-bottom:hover, .go-to-bottom:focus {
     color: #563d7c;
     text-decoration: none;
 }
 
-.go-to-bottom {
+.back-to-top, .go-to-bottom {
     margin-top: 0;
 }