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/menu.c

@@ -343,8 +343,8 @@ int do_menu(const struct menu_item_ex *start_menu, int *start_selected,
     const struct menu_item_ex *temp, *menu;
     int ret = 0, i;
     bool redraw_lists;
-    int oldbars = viewportmanager_get_statusbar();
-    viewportmanager_set_statusbar(hide_bars ? VP_SB_HIDE_ALL : oldbars);
+   FOR_NB_SCREENS(i)
+       viewportmanager_theme_enable(i, true/*!hide_bars*/, NULL);
     
     const struct menu_item_ex *menu_stack[MAX_MENUS];
     int menu_stack_selected_item[MAX_MENUS];
@@ -686,7 +686,8 @@ int do_menu(const struct menu_item_ex *start_menu, int *start_selected,
         *start_selected = get_menu_selection(
                             gui_synclist_get_sel_pos(&lists), menu);
     }
-    viewportmanager_set_statusbar(oldbars);
+   FOR_NB_SCREENS(i)
+       viewportmanager_theme_undo(i);
     return ret;
 }