FS#10824 - viewport/statusbar API rework.

Hopefully the only user visible changes are:
- fm and recording screens go by the statusbar setting (sbs or inbuilt)
- plugins go back to using the theme as they should for menus and lists
- splash screens might get cut a bit... entirely theme and splash dependant.. if there is a problematic one we can look at it later.
- hopefully nothing more than very minor screen flickerings... let me know exactly where they are so they can be fixed

New GUI screen rules:
* Screens assume that the theme (sbs+ui viewport+ maybe background image) are always enabled. They may be disabled on a per display basis, but MUST be re-enabled on exit
* Screens must not be coded in a way that requires a statusbar of any type.. the inbuilt bar will be removed shortly.
ALWAYS RESPECT THE USERS SETTINGS unless the screen requires the full display to fit.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23904 a1c6a512-1295-4272-9138-f99709370657

apps/debug_menu.c

@@ -2652,13 +2652,15 @@ static const struct the_menu_item menuitems[] = {
     };
 static int menu_action_callback(int btn, struct gui_synclist *lists)
 {
+   int i;
     if (btn == ACTION_STD_OK)
     {
-        int oldbars = viewportmanager_set_statusbar(VP_SB_HIDE_ALL);
+        FOR_NB_SCREENS(i)
+           viewportmanager_theme_enable(i, false, NULL);
         menuitems[gui_synclist_get_sel_pos(lists)].function();
         btn = ACTION_REDRAW;
-        send_event(GUI_EVENT_REFRESH, NULL);
-        viewportmanager_set_statusbar(oldbars);
+        FOR_NB_SCREENS(i)
+            viewportmanager_theme_undo(i);
     }
     return btn;
 }