Change the way how playlists and system menu items in the main menu are internally invoked so that the mechanism to

pass the back button press to the android system (to let it go to the home screen) works for them.
This fixes that the back button goes still to the home screen after entering these items.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29157 a1c6a512-1295-4272-9138-f99709370657

apps/menus/exported_menus.h

@@ -26,7 +26,6 @@
 #ifndef PLUGIN 
 
 extern const struct menu_item_ex 
-        main_menu_,                 /* main_menu.c      */
         display_menu,               /* display_menu.c   */
         playback_settings,          /* playback_menu.c  */
 #ifdef HAVE_RECORDING
@@ -38,12 +37,10 @@ extern const struct menu_item_ex
         sound_settings,             /* sound_menu.c     */
         settings_menu_item,         /* settings_menu.c  */
         playlist_settings,          /* playlist_menu.c  */
-        playlist_options,           /* playlist_menu.c  */
         equalizer_menu,             /* eq_menu.c        */
 #ifdef AUDIOHW_HAVE_EQ
         audiohw_eq_tone_controls,   /* audiohw_eq_menu.c */
 #endif
-        info_menu,                  /* info_menu.c      */
         theme_menu;                 /* theme_menu.c     */
 
 struct browse_folder_info {