Changed unix global overlay for 'Redo' to use Mac style shortcut key.

xpfe/global/resources/content/unix/platformGlobalOverlay.xul

@@ -21,6 +21,6 @@
 	
 	<!-- Edit Menu -->
 	<menuitem id="menu_redo" value="&redoCmd.label;" key="key_redo" observes="cmd_redo"/>
-	<key id="key_redo" command="true" key="&redoCmd.key;" observes="cmd_redo"/>
+	<key id="key_redo" command="true" shift="true" key="&redoCmd.key;" observes="cmd_redo"/>
 	
 </overlay>		

xpfe/global/resources/locale/unix/platformGlobalOverlay.dtd

@@ -8,4 +8,4 @@
 <!ENTITY quitApplicationCmd.key				"Q"> 
 
 <!ENTITY redoCmd.label						"Redo">  
-<!ENTITY redoCmd.key						"Y">  
+<!ENTITY redoCmd.key						"Z">