fixed broken link, added monospace to menu.

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

@@ -32,7 +32,7 @@ On this page, we look at the overlay variant, which is more commonly used in gam
 
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-The jme3-niftygui library is included in jMonkeyEngine. If you installed jMonkeyEngine using one of the <<wiki/#install#,optional methods>>, it will be added to your projects Library folder as part of the installation. If you're using the jMonkeyEngine SDK, you add it to any project by btn:[RMB] selecting your projects `Library` folder, choosing menu:Add Library[jme-niftygui] followed by `Add Library`.
+The jme3-niftygui library is included in jMonkeyEngine. If you installed jMonkeyEngine using one of the <<install#,optional methods>>, it will be added to your projects Library folder as part of the installation. If you're using the jMonkeyEngine SDK, you add it to any project by btn:[RMB] selecting your projects `Library` folder, choosing `menu:Add Library[jme-niftygui]` followed by `Add Library`.
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