Enable access to Shortcuts Menu from QuickScreen

Offers a quick way of switching to the Shortcuts Menu
by pressing the 'context menu' button while QuickScreen
is active (e.g. long press Select on iPods and some other
players)

Change-Id: I38292c7070cf093a81e1db688809b1f0d6a8764a

manual/main_menu/main.tex

@@ -270,6 +270,9 @@ utilities. A detailed description of the different plugins is to be found in
     To do so, slide your finger around the click wheel as you would on the
     While Playing Screen.}
   }
+
+  Press \ActionStdContext{} to access the \setting{Shortcuts Menu} directly from the
+  \setting{Quick Screen}.
 }
 
 \section{\label{ref:MainMenuShortcuts}Shortcuts}