created docs/components/miscellaneous.md with dropdown-hover infos

docs/_config.yml

@@ -56,6 +56,8 @@ navigation:
       url: components/timeline.html
     - title: Ribbons
       url: components/ribbons.html
+    - title: Miscellaneous
+      url: components/miscellaneous.html
     - title: Plugins
       url: components/plugins.html
 - title: JavaScript

docs/components/miscellaneous.md

+---
+layout: page
+title: Miscellaneous
+---
+AdminLTE has smaller custom classes that not related to other components are listed here.
+
+
+### Dropdown Hover
+You can add the `.dropdown-hover` class beside this classes:
+- `.dropdown` (to use hover for the whole dropdown menu)
+- `.dropdown-menu` (to use hover on a specific menu item & sub menus)
+- `.dropdown-submenu` (to use hover on a specific sub menu item & sub sub menus)
+