Added link to online wiki controls.

src/docs/asciidoc/jme3/advanced/nifty_gui_java_layout.adoc

@@ -575,8 +575,12 @@ Note that these controls don't do anything yet – we'll get to that soon.
 
 ==== Other Controls
 
-Nifty additionally offers many customizable controls such as check boxes, text fields, menus, chats, tabs, … See also link:https://versaweb.dl.sourceforge.net/project/nifty-gui/nifty-gui/1.3.2/nifty-gui-the-manual-1.3.2.pdf[Nifty GUI - the Manual: Elements].
+Nifty additionally offers many customizable controls such as check boxes, text fields, menus, chats, tabs, …
 
+See also:
+
+*  link:https://versaweb.dl.sourceforge.net/project/nifty-gui/nifty-gui/1.3.2/nifty-gui-the-manual-1.3.2.pdf[Nifty GUI - the Manual: Elements]
+*  link:https://github.com/nifty-gui/nifty-gui/wiki/Controls[Controls]
 
 == Intermediate Result