Bug #216209 --> for non mac platforms, hook up F2 to rename a folder

thanks to Stephen Walker for the patch.

mail/base/content/mailWindowOverlay.xul

@@ -276,6 +276,9 @@
 
   <!-- File Menu -->
   <key id="key_close"/>
+#ifndef XP_MACOSX
+  <key id="key_renameFolder" keycode="&renameFolder.key;" oncommand="goDoCommand('cmd_renameFolder')"/>
+#endif
   <key id="key_quit"/>
   <!-- Edit Menu -->
   <key id="key_undo"/>
@@ -1042,6 +1045,7 @@
            <menuseparator/>
           <menuitem id="menu_renameFolder" label="&renameFolder.label;"
                  accesskey="&renameFolder.accesskey;"
+                 key="key_renameFolder"
                  observes="cmd_renameFolder"/>
           <menuitem id="menu_compactFolder" label="&compactFolders.label;" accesskey="&compactFolder.accesskey;" observes="cmd_compactFolder"/>
           <menuitem id="menu_emptyTrash" label="&emptyTrashCmd.label;"

mail/base/locale/messenger.dtd

@@ -36,6 +36,7 @@
 <!ENTITY subscribeCmd.accesskey "b">
 <!ENTITY renameFolder.label "Rename Folder...">
 <!ENTITY renameFolder.accesskey "R">
+<!ENTITY renameFolder.key "VK_F2"> 
 <!ENTITY compactFolders.label "Compact Folders">
 <!ENTITY compactFolder.accesskey		"F">
 <!ENTITY emptyTrashCmd.label "Empty Trash">