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/plugin.h

@@ -135,12 +135,12 @@ void* plugin_get_buffer(size_t *buffer_size);
 #define PLUGIN_MAGIC 0x526F634B /* RocK */
 
 /* increase this every time the api struct changes */
-#define PLUGIN_API_VERSION 175
+#define PLUGIN_API_VERSION 176
 
 /* update this to latest version if a change to the api struct breaks
    backwards compatibility (and please take the opportunity to sort in any
    new function which are "waiting" at the end of the function table) */
-#define PLUGIN_MIN_API_VERSION 173
+#define PLUGIN_MIN_API_VERSION 176
 
 /* plugin return codes */
 enum plugin_status {
@@ -335,7 +335,6 @@ struct plugin_api {
                               int height);
 #endif
     void (*viewport_set_defaults)(struct viewport *vp, enum screen_type screen);
-    int (*viewportmanager_set_statusbar)(int enable_status);
     /* list */
     void (*gui_synclist_init)(struct gui_synclist * lists,
             list_get_name callback_get_item_name, void * data,